diff --git a/cms/envs/common.py b/cms/envs/common.py
index 7521cc21fa1..717e0a2978a 100644
--- a/cms/envs/common.py
+++ b/cms/envs/common.py
@@ -676,6 +676,7 @@
 LMS_ROOT = REPO_ROOT / "lms"
 ENV_ROOT = REPO_ROOT.dirname()  # virtualenv dir /edx-platform is in
 COURSES_ROOT = ENV_ROOT / "data"
+XMODULE_ROOT = REPO_ROOT / "xmodule"
 
 GITHUB_REPO_ROOT = ENV_ROOT / "data"
 
@@ -1281,6 +1282,10 @@
 STATICFILES_DIRS = [
     COMMON_ROOT / "static",
     PROJECT_ROOT / "static",
+    # Temporarily adding the following static path as we are migrating the built-in blocks' Sass to vanilla CSS.
+    # Once all of the built-in blocks are extracted from edx-platform, we can remove this static path.
+    # Relevant ticket: https://github.com/openedx/edx-platform/issues/35300
+    XMODULE_ROOT / "static",
 ]
 
 # Locale/Internationalization
diff --git a/common/static/sass/_builtin-block-variables.scss b/common/static/sass/_builtin-block-variables.scss
index 2c567c6fb1f..e232cb57d57 100644
--- a/common/static/sass/_builtin-block-variables.scss
+++ b/common/static/sass/_builtin-block-variables.scss
@@ -16,7 +16,6 @@
 
 :root {
     --action-primary-active-bg: $action-primary-active-bg;
-    --all-text-inputs: $all-text-inputs;
     --base-font-size: $base-font-size;
     --base-line-height: $base-line-height;
     --baseline: $baseline;
@@ -26,6 +25,7 @@
     --blue-d1: $blue-d1;
     --blue-d2: $blue-d2;
     --blue-d4: $blue-d4;
+    --blue-s1: $blue-s1;
     --body-color: $body-color;
     --border-color: $border-color;
     --bp-screen-lg: $bp-screen-lg;
@@ -34,6 +34,8 @@
     --danger: $danger;
     --darkGrey: $darkGrey;
     --error-color: $error-color;
+    --error-color-dark: darken($error-color, 11%);
+    --error-color-light: lighten($error-color, 25%);
     --font-bold: $font-bold;
     --font-family-sans-serif: $font-family-sans-serif;
     --general-color-accent: $general-color-accent;
@@ -44,6 +46,12 @@
     --gray-l3: $gray-l3;
     --gray-l4: $gray-l4;
     --gray-l6: $gray-l6;
+    --icon-correct: url($static-path + '/images/correct-icon.png');
+    --icon-incorrect: url($static-path + '/images/incorrect-icon.png');
+    --icon-info: url($static-path + '/images/info-icon.png');
+    --icon-partially-correct: url($static-path + '/images/partially-correct-icon.png');
+    --icon-spinner: url($static-path + '/images/spinner.gif');
+    --icon-unanswered: url($static-path + '/images/unanswered-icon.png');
     --incorrect: $incorrect;
     --lightGrey: $lightGrey;
     --lighter-base-font-color: $lighter-base-font-color;
diff --git a/lms/envs/common.py b/lms/envs/common.py
index b59d60c751f..2f47e006c69 100644
--- a/lms/envs/common.py
+++ b/lms/envs/common.py
@@ -1932,6 +1932,10 @@ def _make_mako_template_dirs(settings):
     COMMON_ROOT / "static",
     PROJECT_ROOT / "static",
     NODE_MODULES_ROOT / "@edx",
+    # Temporarily adding the following static path as we are migrating the built-in blocks' Sass to vanilla CSS.
+    # Once all of the built-in blocks are extracted from edx-platform, we can remove this static path.
+    # Relevant ticket: https://github.com/openedx/edx-platform/issues/35300
+    XMODULE_ROOT / "static",
 ]
 
 FAVICON_PATH = 'images/favicon.ico'
diff --git a/xmodule/assets/tabs/_tabs.scss b/xmodule/assets/tabs/_tabs.scss
index ad47d915a23..4b8c2a387a9 100644
--- a/xmodule/assets/tabs/_tabs.scss
+++ b/xmodule/assets/tabs/_tabs.scss
@@ -31,12 +31,12 @@
   .edit-header {
     box-sizing: border-box;
 
-    padding: 18px $baseline;
+    padding: 18px var(--baseline);
     top: 0 !important; // ugly override for second level tab override
     right: 0;
-    background-color: $blue;
-    border-bottom: 1px solid $blue-d2;
-    color: $white;
+    background-color: var(--blue);
+    border-bottom: 1px solid var(--blue-d2);
+    color: var(--white);
 
     //Component Name
     .component-name {
@@ -44,16 +44,16 @@
       top: 0;
       left: 0;
       width: 50%;
-      color: $white;
+      color: var(--white);
       font-weight: 600;
 
 
 
       em {
         display: inline-block;
-        margin-right: ($baseline/4);
+        margin-right: calc((var(--baseline)/4));
         font-weight: 400;
-        color: $white;
+        color: var(--white);
       }
     }
 
@@ -61,9 +61,9 @@
     .editor-tabs {
       list-style: none;
       right: 0;
-      top: ($baseline/4);
+      top: calc((var(--baseline)/4));
       position: absolute;
-      padding: 12px ($baseline*0.75);
+      padding: 12px calc((var(--baseline)*0.75));
 
       .inner_tab_wrap {
         display: inline-block;
@@ -73,25 +73,25 @@
           @include font-size(14);
           @include linear-gradient(top, rgba(255, 255, 255, 0.3), rgba(255, 255, 255, 0));
 
-          border: 1px solid $blue-d1;
+          border: 1px solid var(--blue-d1);
           border-radius: 3px;
-          padding: ($baseline/4) ($baseline);
-          background-color: $blue;
+          padding: calc((var(--baseline)/4)) (var(--baseline));
+          background-color: var(--blue);
           font-weight: bold;
-          color: $white;
+          color: var(--white);
 
           &.current {
-            @include linear-gradient($blue, $blue);
+            @include linear-gradient(var(--blue), var(--blue));
 
-            color: $blue-d1;
-            box-shadow: inset 0 1px 2px 1px $shadow-l1;
-            background-color: $blue-d4;
+            color: var(--blue-d1);
+            box-shadow: inset 0 1px 2px 1px var(--shadow-l1);
+            background-color: var(--blue-d4);
             cursor: default;
           }
 
           &:hover,
           &:focus {
-            box-shadow: inset 0 1px 2px 1px  $shadow;
+            box-shadow: inset 0 1px 2px 1px  var(--shadow);
             background-image: linear-gradient(#009fe6, #009fe6) !important;
           }
         }
@@ -113,7 +113,7 @@
     .comp-subtitles-import-list {
       > li {
         display: block;
-        margin: $baseline/2 0;
+        margin: calc(var(--baseline)/2) 0;
       }
 
       .blue-button {
@@ -128,7 +128,7 @@
 }
 
 .component-tab {
-  background: $white;
+  background: var(--white);
   position: relative;
   border-top: 1px solid #8891a1;
 
diff --git a/xmodule/assets/video/_accessible_menu.scss b/xmodule/assets/video/_accessible_menu.scss
index f7153fa9842..d411925f239 100644
--- a/xmodule/assets/video/_accessible_menu.scss
+++ b/xmodule/assets/video/_accessible_menu.scss
@@ -1,11 +1,12 @@
 @import 'base/mixins';
+@import 'lms/theme/variables-v1';
 
 $a11y--gray: rgb(127, 127, 127);
 $a11y--blue: rgb(0, 159, 230);
-$a11y--gray-d1: shade($gray, 20%);
-$a11y--gray-l2: tint($gray, 40%);
-$a11y--gray-l3: tint($gray, 60%);
-$a11y--blue-s1: saturate($blue, 15%);
+$a11y--gray-d1: var(--gray-d1);
+$a11y--gray-l2: var(--gray-l2);
+$a11y--gray-l3: var(--gray-l3);
+$a11y--blue-s1: var(--blue-s1);
 
 %use-font-awesome {
   font-family: FontAwesome;
@@ -32,7 +33,7 @@ $a11y--blue-s1: saturate($blue, 15%);
     display: none;
     position: absolute;
     list-style: none;
-    background-color: $white;
+    background-color: var(--white);
     border: 1px solid #eee;
 
     li {
@@ -41,7 +42,7 @@ $a11y--blue-s1: saturate($blue, 15%);
       margin: 0;
       padding: 0;
       border-bottom: 1px solid #eee;
-      color: $white;
+      color: var(--white);
 
       a {
         display: block;
@@ -84,23 +85,23 @@ $a11y--blue-s1: saturate($blue, 15%);
 
     &.open {
       > a {
-        background-color: $action-primary-active-bg;
-        color: $very-light-text;
+        background-color: var(--action-primary-active-bg);
+        color: var(--very-light-text);
 
         &::after {
-          color: $very-light-text;
+          color: var(--very-light-text);
         }
       }
     }
 
     > a {
-      @include transition(all $tmg-f2 ease-in-out 0s);
+      @include transition(all var(--tmg-f2) ease-in-out 0s);
       @include font-size(12);
 
       display: block;
       border-radius: 0 3px 3px 0;
-      background-color: $very-light-text;
-      padding: ($baseline*0.75) ($baseline*1.25) ($baseline*0.75) ($baseline*0.75);
+      background-color: var(--very-light-text);
+      padding: calc((var(--baseline)*0.75)) calc((var(--baseline)*1.25)) calc((var(--baseline)*0.75)) calc((var(--baseline)*0.75));
       color: $a11y--gray-l2;
       min-width: 1.5em;
       line-height: 14px;
@@ -113,9 +114,9 @@ $a11y--blue-s1: saturate($blue, 15%);
 
         content: "\f0d7";
         position: absolute;
-        right: ($baseline*0.5);
+        right: calc((var(--baseline)*0.5));
         top: 33%;
-        color: $lighter-base-font-color;
+        color: var(--lighter-base-font-color);
       }
     }
 
@@ -144,7 +145,7 @@ $a11y--blue-s1: saturate($blue, 15%);
   @extend %ui-depth5;
 
   border: 1px solid #333;
-  background: $white;
+  background: var(--white);
   color: #333;
   padding: 0;
   margin: 0;
@@ -162,8 +163,8 @@ $a11y--blue-s1: saturate($blue, 15%);
 
   .menu-item,
   .submenu-item {
-    border-top: 1px solid $gray-l3;
-    padding: ($baseline/4) ($baseline/2);
+    border-top: 1px solid var(--gray-l3);
+    padding: calc((var(--baseline)/4)) calc((var(--baseline)/2));
     outline: none;
 
     & > span {
@@ -176,17 +177,17 @@ $a11y--blue-s1: saturate($blue, 15%);
 
     &:focus {
       background: #333;
-      color: $white;
+      color: var(--white);
 
       & > span {
-        color: $white;
+        color: var(--white);
       }
     }
   }
 
   .submenu-item {
     position: relative;
-    padding: ($baseline/4) $baseline ($baseline/4) ($baseline/2);
+    padding: calc((var(--baseline)/4)) var(--baseline) calc((var(--baseline)/4)) calc((var(--baseline)/2));
 
     &::after {
       content: '\25B6';
@@ -202,10 +203,10 @@ $a11y--blue-s1: saturate($blue, 15%);
 
     &.is-opened {
       background: #333;
-      color: $white;
+      color: var(--white);
 
       & > span {
-        color: $white;
+        color: var(--white);
       }
 
       & > .submenu {
@@ -220,7 +221,7 @@ $a11y--blue-s1: saturate($blue, 15%);
 
   .is-disabled {
     pointer-events: none;
-    color: $gray-l3;
+    color: var(--gray-l3);
   }
 }
 
diff --git a/xmodule/assets/video/_display.scss b/xmodule/assets/video/_display.scss
index fd5cd73b210..928f4a91544 100644
--- a/xmodule/assets/video/_display.scss
+++ b/xmodule/assets/video/_display.scss
@@ -23,7 +23,7 @@ $secondary-light: rgb(219, 139, 175); // UXPL secondary light
 $cool-dark: rgb(79, 89, 93); // UXPL cool dark
 
 & {
-  margin-bottom: ($baseline*1.5);
+  margin-bottom: calc((var(--baseline)*1.5));
 }
 
 .is-hidden {
@@ -99,9 +99,9 @@ $cool-dark: rgb(79, 89, 93); // UXPL cool dark
     .branding,
     .wrapper-transcript-feedback {
       flex: 1;
-      margin-top: $baseline;
+      margin-top: var(--baseline);
 
-      @include padding-right($baseline);
+      @include padding-right(var(--baseline));
 
       vertical-align: top;
     }
@@ -147,14 +147,14 @@ $cool-dark: rgb(79, 89, 93); // UXPL cool dark
         left: -9999em;
         display: inline-block;
         vertical-align: middle;
-        color: $body-color;
+        color: var(--body-color);
       }
 
       .brand-logo {
         display: inline-block;
         max-width: 100%;
-        max-height: ($baseline*2);
-        padding: ($baseline/4) 0;
+        max-height: calc((var(--baseline)*2));
+        padding: calc((var(--baseline)/4)) 0;
         vertical-align: middle;
       }
     }
@@ -180,8 +180,8 @@ $cool-dark: rgb(79, 89, 93); // UXPL cool dark
 
   .google-disclaimer {
     display: none;
-    margin-top: $baseline;
-    @include padding-right($baseline);
+    margin-top: var(--baseline);
+    @include padding-right(var(--baseline));
     vertical-align: top;
   }
 
@@ -246,7 +246,7 @@ $cool-dark: rgb(79, 89, 93); // UXPL cool dark
       opacity: 0.1;
 
       &::after {
-        background: $white;
+        background: var(--white);
         position: absolute;
         width: 50%;
         height: 50%;
@@ -271,23 +271,23 @@ $cool-dark: rgb(79, 89, 93); // UXPL cool dark
     }
 
     .closed-captions.is-visible {
-      max-height: ($baseline * 3);
-      border-radius: ($baseline / 5);
-      padding: 8px ($baseline / 2) 8px ($baseline * 1.5);
+      max-height: calc((var(--baseline) * 3));
+      border-radius: calc((var(--baseline) / 5));
+      padding: 8px calc((var(--baseline) / 2)) 8px calc((var(--baseline) * 1.5));
       background: rgba(0, 0, 0, 0.75);
-      color: $yellow;
+      color: var(--yellow);
 
       &::before {
         position: absolute;
         display: inline-block;
         top: 50%;
 
-        @include left($baseline);
+        @include left(var(--baseline));
 
         margin-top: -0.6em;
         font-family: 'FontAwesome';
         content: "\f142";
-        color: $white;
+        color: var(--white);
         opacity: 0.5;
       }
 
@@ -316,7 +316,7 @@ $cool-dark: rgb(79, 89, 93); // UXPL cool dark
 
       .video-error,
       .video-hls-error {
-        padding: ($baseline / 5);
+        padding: calc((var(--baseline) / 5));
         background: black;
         color: white !important; // the pattern library headings shim is more scoped
       }
@@ -366,7 +366,7 @@ $cool-dark: rgb(79, 89, 93); // UXPL cool dark
         margin: 0;
         border: 0;
         border-radius: 0;
-        padding: ($baseline / 2) ($baseline / 1.5);
+        padding: calc((var(--baseline) / 2)) calc((var(--baseline) / 1.5));
         background: rgb(40, 44, 46); // UXPL grayscale-cool x-dark
         box-shadow: none;
         text-shadow: none;
@@ -409,7 +409,7 @@ $cool-dark: rgb(79, 89, 93); // UXPL cool dark
         left: 0;
         right: 0;
         z-index: 1;
-        height: ($baseline / 4);
+        height: calc((var(--baseline) / 4));
         margin-left: 0;
         border: 1px solid $cool-dark;
         border-radius: 0;
@@ -436,11 +436,11 @@ $cool-dark: rgb(79, 89, 93); // UXPL cool dark
 
           box-sizing: border-box;
           top: -1px;
-          height: ($baseline / 4);
-          width: ($baseline / 4);
-          margin-left: -($baseline / 8); // center-center causes the control to be beyond the end of the sider
+          height: calc((var(--baseline) / 4));
+          width: calc((var(--baseline) / 4));
+          margin-left: calc(-1 * (var(--baseline) / 8)); // center-center causes the control to be beyond the end of the sider
           border: 1px solid $secondary-base;
-          border-radius: ($baseline / 5);
+          border-radius: calc((var(--baseline) / 5));
           padding: 0;
           background: $secondary-base;
           box-shadow: none;
@@ -527,7 +527,7 @@ $cool-dark: rgb(79, 89, 93); // UXPL cool dark
 
             position: absolute;
             display: none;
-            bottom: ($baseline * 2);
+            bottom: calc((var(--baseline) * 2));
 
             @include right(0); // right-align menus since this whole collection is on the right
 
@@ -571,9 +571,9 @@ $cool-dark: rgb(79, 89, 93); // UXPL cool dark
               &.is-active {
                 .speed-option,
                 .control-lang {
-                  @include border-left($baseline/10 solid rgb(14, 166, 236));
+                  @include border-left(calc(var(--baseline) / 10) solid rgb(14, 166, 236));
 
-                  font-weight: $font-bold;
+                  font-weight: var(--font-bold);
                   color: rgb(14, 166, 236); // UXPL primary accent
                 }
               }
@@ -610,9 +610,9 @@ $cool-dark: rgb(79, 89, 93); // UXPL cool dark
 
           .speed-button {
             .label {
-              @include padding(0 ($baseline/3) 0 0);
+              @include padding(0 calc((var(--baseline)/3)) 0 0);
 
-              font-family: $font-family-sans-serif;
+              font-family: var(--font-family-sans-serif);
               color: rgb(231, 236, 238); // UXPL grayscale-cool x-light
 
               @media (max-width: 1120px) {
@@ -636,8 +636,8 @@ $cool-dark: rgb(79, 89, 93); // UXPL cool dark
 
         .lang {
           .language-menu {
-            width: $baseline;
-            padding: ($baseline / 2) 0;
+            width: var(--baseline);
+            padding: calc((var(--baseline) / 2)) 0;
           }
 
           .control {
@@ -685,7 +685,7 @@ $cool-dark: rgb(79, 89, 93); // UXPL cool dark
 
             display: none;
             position: absolute;
-            bottom: ($baseline * 2);
+            bottom: calc((var(--baseline) * 2));
 
             @include right(0);
 
@@ -695,7 +695,7 @@ $cool-dark: rgb(79, 89, 93); // UXPL cool dark
 
             .volume-slider {
               height: 100px;
-              width: ($baseline / 4);
+              width: calc((var(--baseline) / 4));
               margin: 14px auto;
               box-sizing: border-box;
               border: 1px solid $cool-dark;
@@ -704,14 +704,14 @@ $cool-dark: rgb(79, 89, 93); // UXPL cool dark
               .ui-slider-handle {
                 @extend %ui-fake-link;
 
-                @include transition(height $tmg-s2 ease-in-out 0s, width $tmg-s2 ease-in-out 0s);
+                @include transition(height var(--tmg-s2) ease-in-out 0s, width var(--tmg-s2) ease-in-out 0s);
                 @include left(-5px);
 
                 box-sizing: border-box;
                 height: 13px;
                 width: 13px;
                 border: 1px solid $secondary-base;
-                border-radius: ($baseline / 5);
+                border-radius: calc((var(--baseline) / 5));
                 padding: 0;
                 background: $secondary-base;
                 box-shadow: none;
@@ -763,11 +763,11 @@ $cool-dark: rgb(79, 89, 93); // UXPL cool dark
     &:hover {
       .video-controls {
         .slider {
-          height: ($baseline / 1.5);
+          height: calc((var(--baseline) / 1.5));
 
           .ui-slider-handle {
-            height: ($baseline / 1.5);
-            width: ($baseline / 1.5);
+            height: calc((var(--baseline) / 1.5));
+            width: calc((var(--baseline) / 1.5));
           }
         }
       }
@@ -887,7 +887,7 @@ $cool-dark: rgb(79, 89, 93); // UXPL cool dark
       bottom: 0;
       top: 0;
       width: 275px;
-      padding: 0 $baseline;
+      padding: 0 var(--baseline);
       display: none;
     }
   }
@@ -973,14 +973,14 @@ $cool-dark: rgb(79, 89, 93); // UXPL cool dark
       box-sizing: border-box;
       @include transition(none);
 
-      background: $black;
+      background: var(--black);
       visibility: visible;
 
       li {
         color: #aaa;
 
         &.current {
-          color: $white;
+          color: var(--white);
         }
       }
     }
@@ -1010,17 +1010,17 @@ $cool-dark: rgb(79, 89, 93); // UXPL cool dark
     background-position: 50% 50%;
     background-repeat: no-repeat;
     background-size: 100%;
-    background-color: $black;
+    background-color: var(--black);
 
     &.is-html5 {
       background-size: 15%;
     }
 
     .btn-play.btn-pre-roll {
-      padding: $baseline;
+      padding: var(--baseline);
       border: none;
-      border-radius: $baseline;
-      background: $black-t2;
+      border-radius: var(--baseline);
+      background: var(--black-t2);
       box-shadow: none;
 
       &::after {
@@ -1030,13 +1030,13 @@ $cool-dark: rgb(79, 89, 93); // UXPL cool dark
       }
 
       img {
-        height: ($baseline * 4);
-        width: ($baseline * 4);
+        height: calc((var(--baseline) * 4));
+        width: calc((var(--baseline) * 4));
       }
 
       &:hover,
       &:focus {
-        background: $blue;
+        background: var(--blue);
       }
     }
   }
diff --git a/xmodule/static/css-builtin-blocks/VideoBlockDisplay.css b/xmodule/static/css-builtin-blocks/VideoBlockDisplay.css
new file mode 100644
index 00000000000..93c4b6adcec
--- /dev/null
+++ b/xmodule/static/css-builtin-blocks/VideoBlockDisplay.css
@@ -0,0 +1,1147 @@
+@import url("https://fonts.googleapis.com/css?family=Open+Sans:300,400,400i,600,700");
+
+.xmodule_display.xmodule_VideoBlock {
+    /* stylelint-disable-line */
+    /* stylelint-disable-line */
+    /* stylelint-disable-line */
+    /* stylelint-disable-line */
+    /* stylelint-disable-line */
+    /* stylelint-disable-line */
+}
+
+.xmodule_display.xmodule_VideoBlock {
+    margin-bottom: calc((var(--baseline) * 1.5));
+}
+
+.xmodule_display.xmodule_VideoBlock .is-hidden, .xmodule_display.xmodule_VideoBlock .video.closed .subtitles {
+    display: none;
+}
+
+.xmodule_display.xmodule_VideoBlock .video {
+    background: whitesmoke;
+    display: block;
+    margin: 0 -12px;
+    padding: 12px;
+    border-radius: 5px;
+    outline: none;
+}
+
+.xmodule_display.xmodule_VideoBlock .video:after {
+    content: "";
+    display: table;
+    clear: both;
+}
+
+.xmodule_display.xmodule_VideoBlock .video:focus, .xmodule_display.xmodule_VideoBlock .video:active, .xmodule_display.xmodule_VideoBlock .video:hover {
+    border: 0;
+}
+
+.xmodule_display.xmodule_VideoBlock .video.is-initialized .video-wrapper .spinner {
+    display: none;
+}
+
+.xmodule_display.xmodule_VideoBlock .video.is-pre-roll .slider {
+    visibility: hidden;
+}
+
+.xmodule_display.xmodule_VideoBlock .video.is-pre-roll .video-player {
+    position: relative;
+}
+
+.xmodule_display.xmodule_VideoBlock .video.is-pre-roll .video-player::before {
+    display: block;
+    content: "";
+    width: 100%;
+    padding-top: 55%;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .tc-wrapper {
+    position: relative;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .tc-wrapper:after {
+    content: "";
+    display: table;
+    clear: both;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .focus_grabber {
+    position: relative;
+    display: inline;
+    width: 0;
+    height: 0;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .downloads-heading {
+    margin: 1em 0 0;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .wrapper-video-bottom-section {
+    display: flex;
+    justify-content: space-between;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .wrapper-video-bottom-section .wrapper-download-video,
+.xmodule_display.xmodule_VideoBlock .video .wrapper-video-bottom-section .wrapper-download-transcripts,
+.xmodule_display.xmodule_VideoBlock .video .wrapper-video-bottom-section .wrapper-handouts,
+.xmodule_display.xmodule_VideoBlock .video .wrapper-video-bottom-section .branding,
+.xmodule_display.xmodule_VideoBlock .video .wrapper-video-bottom-section .wrapper-transcript-feedback {
+    flex: 1;
+    margin-top: var(--baseline);
+    padding-right: var(--baseline);
+    vertical-align: top;
+}
+
+@media (min-width: 768px) {
+    .xmodule_display.xmodule_VideoBlock .video .wrapper-downloads {
+        display: flex;
+    }
+}
+
+.xmodule_display.xmodule_VideoBlock .video .wrapper-downloads .hd {
+    margin: 0;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .wrapper-downloads .wrapper-download-video .video-sources {
+    margin: 0;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .wrapper-downloads .wrapper-download-transcripts .list-download-transcripts {
+    margin: 0;
+    padding: 0;
+    list-style: none;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .wrapper-downloads .wrapper-download-transcripts .list-download-transcripts .transcript-option {
+    margin: 0;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .wrapper-downloads .wrapper-download-transcripts .list-download-transcripts .transcript-option a.btn, .xmodule_display.xmodule_VideoBlock .video .wrapper-downloads .wrapper-download-transcripts .list-download-transcripts .transcript-option a.btn-link {
+    font-size: 16px !important;
+    font-weight: unset;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .wrapper-downloads .branding {
+    padding-right: 0;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .wrapper-downloads .branding .host-tag {
+    position: absolute;
+    left: -9999em;
+    display: inline-block;
+    vertical-align: middle;
+    color: var(--body-color);
+}
+
+.xmodule_display.xmodule_VideoBlock .video .wrapper-downloads .branding .brand-logo {
+    display: inline-block;
+    max-width: 100%;
+    max-height: calc((var(--baseline) * 2));
+    padding: calc((var(--baseline) / 4)) 0;
+    vertical-align: middle;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .wrapper-transcript-feedback {
+    display: none;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .wrapper-transcript-feedback .transcript-feedback-buttons {
+    display: flex;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .wrapper-transcript-feedback .transcript-feedback-btn-wrapper {
+    margin-right: 10px;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .wrapper-transcript-feedback .thumbs-up-btn,
+.xmodule_display.xmodule_VideoBlock .video .wrapper-transcript-feedback .thumbs-down-btn {
+    border: none;
+    box-shadow: none;
+    background: transparent;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .google-disclaimer {
+    display: none;
+    margin-top: var(--baseline);
+    padding-right: var(--baseline);
+    vertical-align: top;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper {
+    float: left;
+    margin-right: 2.27273%;
+    width: 65.90909%;
+    background-color: black;
+    position: relative;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper:hover .btn-play {
+    color: #0075b4;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper:hover .btn-play::after {
+    background: #fff;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-player-pre,
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-player-post {
+    height: 50px;
+    background-color: #111010;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .spinner {
+    transform: translate(-50%, -50%);
+    position: absolute;
+    z-index: 1;
+    background: rgba(0, 0, 0, 0.7);
+    top: 50%;
+    left: 50%;
+    padding: 30px;
+    border-radius: 25%;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .spinner::after {
+    animation: rotateCW 3s infinite linear;
+    content: '';
+    display: block;
+    width: 30px;
+    height: 30px;
+    border: 7px solid white;
+    border-top-color: transparent;
+    border-radius: 100%;
+    position: relative;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .btn-play {
+    transform: translate(-50%, -50%);
+    position: absolute;
+    z-index: 1;
+    top: 46%;
+    left: 50%;
+    font-size: 4em;
+    cursor: pointer;
+    opacity: 0.1;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .btn-play::after {
+    background: var(--white);
+    position: absolute;
+    width: 50%;
+    height: 50%;
+    content: '';
+    left: 0;
+    top: 0;
+    bottom: 0;
+    right: 0;
+    margin: auto;
+    z-index: -1;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .closed-captions {
+    left: 5%;
+    position: absolute;
+    width: 90%;
+    box-sizing: border-box;
+    top: 70%;
+    text-align: center;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .closed-captions.is-visible {
+    max-height: calc((var(--baseline) * 3));
+    border-radius: calc((var(--baseline) / 5));
+    padding: 8px calc((var(--baseline) / 2)) 8px calc((var(--baseline) * 1.5));
+    background: rgba(0, 0, 0, 0.75);
+    color: var(--yellow);
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .closed-captions.is-visible::before {
+    position: absolute;
+    display: inline-block;
+    top: 50%;
+    left: var(--baseline);
+    margin-top: -0.6em;
+    font-family: 'FontAwesome';
+    content: "\f142";
+    color: var(--white);
+    opacity: 0.5;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .closed-captions.is-visible:hover, .xmodule_display.xmodule_VideoBlock .video .video-wrapper .closed-captions.is-visible.is-dragging {
+    background: black;
+    cursor: move;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .closed-captions.is-visible:hover::before, .xmodule_display.xmodule_VideoBlock .video .video-wrapper .closed-captions.is-visible.is-dragging::before {
+    opacity: 1;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-player {
+    overflow: hidden;
+    min-height: 158px;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-player > div {
+    height: 100%;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-player > div.hidden {
+    display: none;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-player .video-error,
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-player .video-hls-error {
+    padding: calc((var(--baseline) / 5));
+    background: black;
+    color: white !important;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-player object,
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-player iframe,
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-player video {
+    left: 0;
+    display: block;
+    border: none;
+    width: 100%;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-player h4 {
+    text-align: center;
+    color: white;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-player h4.hidden {
+    display: none;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls {
+    position: relative;
+    border: 0;
+    background: #282c2e;
+    color: #f0f3f5;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls:after {
+    content: "";
+    display: table;
+    clear: both;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls:hover ul,
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls:hover div, .xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls:focus ul,
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls:focus div {
+    opacity: 1;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .control {
+    display: inline-block;
+    vertical-align: middle;
+    margin: 0;
+    border: 0;
+    border-radius: 0;
+    padding: calc((var(--baseline) / 2)) calc((var(--baseline) / 1.5));
+    background: #282c2e;
+    box-shadow: none;
+    text-shadow: none;
+    color: #cfd8dc;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .control:hover, .xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .control:focus {
+    background: #171a1b;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .control:active, .xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .is-active.control, .xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .active.control {
+    color: #0ea6ec;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .control .icon {
+    width: 1em;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .control .icon.icon-hd {
+    width: auto;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .slider {
+    transform-origin: bottom left;
+    transition: height 0.7s ease-in-out 0s;
+    box-sizing: border-box;
+    position: absolute;
+    bottom: 100%;
+    left: 0;
+    right: 0;
+    z-index: 1;
+    height: calc((var(--baseline) / 4));
+    margin-left: 0;
+    border: 1px solid #4f595d;
+    border-radius: 0;
+    background: #4f595d;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .slider:after {
+    content: "";
+    display: table;
+    clear: both;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .slider .ui-widget-header {
+    background: #8e3e63;
+    border: 1px solid #8e3e63;
+    box-shadow: none;
+    top: -1px;
+    left: -1px;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .slider .ui-corner-all.slider-range {
+    opacity: 0.3;
+    background-color: #1e91d3;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .slider .ui-slider-handle {
+    transform-origin: bottom left;
+    transition: all 0.7s ease-in-out 0s;
+    box-sizing: border-box;
+    top: -1px;
+    height: calc((var(--baseline) / 4));
+    width: calc((var(--baseline) / 4));
+    margin-left: calc(-1 * (var(--baseline) / 8));
+    border: 1px solid #cb598d;
+    border-radius: calc((var(--baseline) / 5));
+    padding: 0;
+    background: #cb598d;
+    box-shadow: none;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .slider .ui-slider-handle:focus, .xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .slider .ui-slider-handle:hover {
+    background-color: #db8baf;
+    border-color: #db8baf;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .vcr {
+    float: left;
+    list-style: none;
+    border-right: 1px solid #282c2e;
+    padding: 0;
+}
+
+@media (max-width: 1120px) {
+    .xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .vcr {
+        margin-right: lh(0.5);
+        font-size: 0.875em;
+    }
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .vcr .video_control:focus {
+    position: relative;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .vcr .video_control.skip {
+    white-space: nowrap;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .vcr .vidtime {
+    padding-left: lh(0.75);
+    display: inline-block;
+    color: #cfd8dc;
+    -webkit-font-smoothing: antialiased;
+}
+
+@media (max-width: 1120px) {
+    .xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .vcr .vidtime {
+        padding-left: lh(0.5);
+    }
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls {
+    float: right;
+    border-left: 1px dotted #4f595d;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .volume,
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .add-fullscreen,
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .grouped-controls,
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .auto-advance,
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .quality-control {
+    border-left: 1px dotted #4f595d;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .speed-button:focus,
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .volume > .control:focus,
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .add-fullscreen:focus,
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .auto-advance:focus,
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .quality-control:focus,
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .toggle-transcript:focus {
+    position: relative;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .menu-container {
+    position: relative;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .menu-container .menu {
+    transition: none;
+    position: absolute;
+    display: none;
+    bottom: calc((var(--baseline) * 2));
+    right: 0;
+    width: 120px;
+    margin: 0;
+    border: none;
+    padding: 0;
+    box-shadow: none;
+    background-color: #282c2e;
+    list-style: none;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .menu-container .menu li {
+    color: #e7ecee;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .menu-container .menu li .speed-option,
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .menu-container .menu li .control-lang {
+    text-align: left;
+    display: block;
+    width: 100%;
+    border: 0;
+    border-radius: 0;
+    padding: lh(0.5);
+    background: #282c2e;
+    box-shadow: none;
+    color: #e7ecee;
+    overflow: hidden;
+    text-shadow: none;
+    text-overflow: ellipsis;
+    white-space: nowrap;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .menu-container .menu li .speed-option:hover, .xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .menu-container .menu li .speed-option:focus,
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .menu-container .menu li .control-lang:hover,
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .menu-container .menu li .control-lang:focus {
+    background-color: #4f595d;
+    color: #fcfcfc;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .menu-container .menu li.is-active .speed-option,
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .menu-container .menu li.is-active .control-lang {
+    border-left: calc(var(--baseline) / 10) solid #0ea6ec;
+    font-weight: var(--font-bold);
+    color: #0ea6ec;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .menu-container.is-opened .menu {
+    display: block;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .speeds,
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .lang,
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .grouped-controls {
+    display: inline-block;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .speeds.is-opened .control .icon {
+    transform: rotate(-90deg);
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .speeds .speed-button .label {
+    padding: 0 calc((var(--baseline) / 3)) 0 0;
+    font-family: var(--font-family-sans-serif);
+    color: #e7ecee;
+}
+
+@media (max-width: 1120px) {
+    .xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .speeds .speed-button .label {
+        position: absolute;
+        clip: rect(1px, 1px, 1px, 1px);
+    }
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .speeds .speed-button .value {
+    padding: 0 lh(0.5) 0 0;
+    color: #e7ecee;
+    font-weight: bold;
+}
+
+@media (max-width: 1120px) {
+    .xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .speeds .speed-button .value {
+        padding: 0 lh(0.5);
+    }
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .lang .language-menu {
+    width: var(--baseline);
+    padding: calc((var(--baseline) / 2)) 0;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .lang.is-opened .control .icon {
+    transform: rotate(90deg);
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .volume {
+    display: inline-block;
+    position: relative;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .volume.is-opened .volume-slider-container {
+    display: block;
+    opacity: 1;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .volume:not(:first-child) > a {
+    border-left: none;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .volume .volume-slider-container {
+    transition: none;
+    display: none;
+    position: absolute;
+    bottom: calc((var(--baseline) * 2));
+    right: 0;
+    width: 41px;
+    height: 120px;
+    background-color: #282c2e;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .volume .volume-slider-container .volume-slider {
+    height: 100px;
+    width: calc((var(--baseline) / 4));
+    margin: 14px auto;
+    box-sizing: border-box;
+    border: 1px solid #4f595d;
+    background: #4f595d;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .volume .volume-slider-container .volume-slider .ui-slider-handle {
+    transition: height var(--tmg-s2) ease-in-out 0s, width var(--tmg-s2) ease-in-out 0s;
+    left: -5px;
+    box-sizing: border-box;
+    height: 13px;
+    width: 13px;
+    border: 1px solid #cb598d;
+    border-radius: calc((var(--baseline) / 5));
+    padding: 0;
+    background: #cb598d;
+    box-shadow: none;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .volume .volume-slider-container .volume-slider .ui-slider-handle:hover, .xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .volume .volume-slider-container .volume-slider .ui-slider-handle:focus {
+    background: #db8baf;
+    border-color: #db8baf;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .volume .volume-slider-container .volume-slider .ui-slider-range {
+    background: #8e3e63;
+    border: 1px solid #8e3e63;
+    left: -1px;
+    bottom: -1px;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .quality-control {
+    font-weight: 700;
+    letter-spacing: -1px;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .quality-control.active {
+    color: #0ea6ec;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .quality-control.is-hidden, .xmodule_display.xmodule_VideoBlock .video.closed .video-wrapper .video-controls .secondary-controls .quality-control.subtitles {
+    display: none !important;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .toggle-transcript.is-active {
+    color: #0ea6ec;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .lang > .hide-subtitles {
+    transition: none;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper:hover .video-controls .slider {
+    height: calc((var(--baseline) / 1.5));
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper:hover .video-controls .slider .ui-slider-handle {
+    height: calc((var(--baseline) / 1.5));
+    width: calc((var(--baseline) / 1.5));
+}
+
+.xmodule_display.xmodule_VideoBlock .video.video-fullscreen .closed-captions {
+    width: 65%;
+}
+
+.xmodule_display.xmodule_VideoBlock .video.video-fullscreen.closed .closed-captions {
+    width: 90%;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .subtitles {
+    float: left;
+    overflow: auto;
+    max-height: 460px;
+    width: 31.81818%;
+    padding: 0;
+    font-size: 14px;
+    visibility: visible;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .subtitles a {
+    color: #0074b5;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .subtitles .subtitles-menu {
+    height: 100%;
+    margin: 0;
+    padding: 0 3px;
+    list-style: none;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .subtitles .subtitles-menu li {
+    margin-bottom: 8px;
+    border: 0;
+    padding: 0;
+    color: #0074b5;
+    line-height: lh();
+}
+
+.xmodule_display.xmodule_VideoBlock .video .subtitles .subtitles-menu li span {
+    display: block;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .subtitles .subtitles-menu li.current {
+    color: #333;
+    font-weight: 700;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .subtitles .subtitles-menu li.focused {
+    outline: #000 dotted thin;
+    outline-offset: -1px;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .subtitles .subtitles-menu li:hover, .xmodule_display.xmodule_VideoBlock .video .subtitles .subtitles-menu li:focus {
+    text-decoration: underline;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .subtitles .subtitles-menu li:empty {
+    margin-bottom: 0;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .subtitles .subtitles-menu li.spacing:last-of-type {
+    position: relative;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .subtitles .subtitles-menu li.spacing:last-of-type .transcript-end {
+    position: absolute;
+    bottom: 0;
+}
+
+.xmodule_display.xmodule_VideoBlock .video.closed .video-wrapper {
+    width: 100%;
+    background-color: inherit;
+}
+
+.xmodule_display.xmodule_VideoBlock .video.closed .video-wrapper .video-controls.html5 {
+    bottom: 0;
+    left: 0;
+    right: 0;
+    position: absolute;
+    z-index: 1;
+}
+
+.xmodule_display.xmodule_VideoBlock .video.closed .video-wrapper .video-player-pre,
+.xmodule_display.xmodule_VideoBlock .video.closed .video-wrapper .video-player-post {
+    height: 0;
+}
+
+.xmodule_display.xmodule_VideoBlock .video.closed .video-wrapper .video-player h3 {
+    color: black;
+}
+
+.xmodule_display.xmodule_VideoBlock .video.closed .subtitles.html5 {
+    background-color: rgba(243, 243, 243, 0.8);
+    height: 100%;
+    position: absolute;
+    right: 0;
+    bottom: 0;
+    top: 0;
+    width: 275px;
+    padding: 0 var(--baseline);
+    display: none;
+}
+
+.xmodule_display.xmodule_VideoBlock .video.video-fullscreen {
+    background: rgba(0, 0, 0, 0.95);
+    border: 0;
+    bottom: 0;
+    height: 100%;
+    left: 0;
+    margin: 0;
+    padding: 0;
+    position: fixed;
+    top: 0;
+    width: 100%;
+    vertical-align: middle;
+    border-radius: 0;
+}
+
+.xmodule_display.xmodule_VideoBlock .video.video-fullscreen.closed .tc-wrapper .video-wrapper {
+    width: 100%;
+}
+
+.xmodule_display.xmodule_VideoBlock .video.video-fullscreen .video-wrapper .video-player-pre,
+.xmodule_display.xmodule_VideoBlock .video.video-fullscreen .video-wrapper .video-player-post {
+    height: 0;
+}
+
+.xmodule_display.xmodule_VideoBlock .video.video-fullscreen .video-wrapper {
+    position: static;
+}
+
+.xmodule_display.xmodule_VideoBlock .video.video-fullscreen .video-wrapper .video-player h3 {
+    color: white;
+}
+
+.xmodule_display.xmodule_VideoBlock .video.video-fullscreen .tc-wrapper {
+    width: 100%;
+    height: 100%;
+    position: static;
+}
+
+.xmodule_display.xmodule_VideoBlock .video.video-fullscreen .tc-wrapper:after {
+    content: "";
+    display: table;
+    clear: both;
+}
+
+.xmodule_display.xmodule_VideoBlock .video.video-fullscreen .tc-wrapper .video-wrapper {
+    height: 100%;
+    width: 75%;
+    margin-right: 0;
+    vertical-align: middle;
+}
+
+.xmodule_display.xmodule_VideoBlock .video.video-fullscreen .tc-wrapper .video-wrapper object,
+.xmodule_display.xmodule_VideoBlock .video.video-fullscreen .tc-wrapper .video-wrapper iframe,
+.xmodule_display.xmodule_VideoBlock .video.video-fullscreen .tc-wrapper .video-wrapper video {
+    position: absolute;
+    width: auto;
+    height: auto;
+}
+
+.xmodule_display.xmodule_VideoBlock .video.video-fullscreen .tc-wrapper .video-controls {
+    position: absolute;
+    bottom: 0;
+    left: 0;
+    width: 100%;
+}
+
+.xmodule_display.xmodule_VideoBlock .video.video-fullscreen .subtitles {
+    height: 100%;
+    width: 25%;
+    padding: lh();
+    box-sizing: border-box;
+    transition: none;
+    background: var(--black);
+    visibility: visible;
+}
+
+.xmodule_display.xmodule_VideoBlock .video.video-fullscreen .subtitles li {
+    color: #aaa;
+}
+
+.xmodule_display.xmodule_VideoBlock .video.video-fullscreen .subtitles li.current {
+    color: var(--white);
+}
+
+.xmodule_display.xmodule_VideoBlock .video.is-touch .tc-wrapper .video-wrapper object,
+.xmodule_display.xmodule_VideoBlock .video.is-touch .tc-wrapper .video-wrapper iframe,
+.xmodule_display.xmodule_VideoBlock .video.is-touch .tc-wrapper .video-wrapper video {
+    width: 100%;
+    height: 100%;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-pre-roll {
+    position: absolute;
+    top: 0;
+    left: 0;
+    right: 0;
+    bottom: 0;
+    background-position: 50% 50%;
+    background-repeat: no-repeat;
+    background-size: 100%;
+    background-color: var(--black);
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-pre-roll.is-html5 {
+    background-size: 15%;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-pre-roll .btn-play.btn-pre-roll {
+    padding: var(--baseline);
+    border: none;
+    border-radius: var(--baseline);
+    background: var(--black-t2);
+    box-shadow: none;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-pre-roll .btn-play.btn-pre-roll::after {
+    display: none;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-pre-roll .btn-play.btn-pre-roll img {
+    height: calc((var(--baseline) * 4));
+    width: calc((var(--baseline) * 4));
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-pre-roll .btn-play.btn-pre-roll:hover, .xmodule_display.xmodule_VideoBlock .video .video-pre-roll .btn-play.btn-pre-roll:focus {
+    background: var(--blue);
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .slider .ui-slider-handle, .xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .menu-container .menu li, .xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .volume .volume-slider-container .volume-slider .ui-slider-handle, .xmodule_display.xmodule_VideoBlock .video .subtitles .subtitles-menu li, .xmodule_display.xmodule_VideoBlock .a11y-menu-container .a11y-menu-list li {
+    cursor: pointer;
+}
+
+.xmodule_display.xmodule_VideoBlock .video.closed .subtitles.html5 {
+    z-index: 0;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .menu-container .menu, .xmodule_display.xmodule_VideoBlock .video .video-wrapper .video-controls .secondary-controls .volume .volume-slider-container {
+    z-index: 10;
+}
+
+.xmodule_display.xmodule_VideoBlock .video .video-pre-roll, .xmodule_display.xmodule_VideoBlock .a11y-menu-container .a11y-menu-list {
+    z-index: 1000;
+}
+
+.xmodule_display.xmodule_VideoBlock .video.video-fullscreen, .xmodule_display.xmodule_VideoBlock .video.video-fullscreen .tc-wrapper .video-controls, .xmodule_display.xmodule_VideoBlock .overlay {
+    z-index: 10000;
+}
+
+.xmodule_display.xmodule_VideoBlock .contextmenu,
+.xmodule_display.xmodule_VideoBlock .submenu {
+    z-index: 100000;
+}
+
+.xmodule_display.xmodule_VideoBlock .video-tracks .a11y-menu-container > a::after {
+    font-family: FontAwesome;
+    -webkit-font-smoothing: antialiased;
+    display: inline-block;
+    speak: none;
+}
+
+.xmodule_display.xmodule_VideoBlock .a11y-menu-container {
+    position: relative;
+}
+
+.xmodule_display.xmodule_VideoBlock .a11y-menu-container.open .a11y-menu-list {
+    display: block;
+}
+
+.xmodule_display.xmodule_VideoBlock .a11y-menu-container .a11y-menu-list {
+    top: 100%;
+    margin: 0;
+    padding: 0;
+    display: none;
+    position: absolute;
+    list-style: none;
+    background-color: var(--white);
+    border: 1px solid #eee;
+}
+
+.xmodule_display.xmodule_VideoBlock .a11y-menu-container .a11y-menu-list li {
+    margin: 0;
+    padding: 0;
+    border-bottom: 1px solid #eee;
+    color: var(--white);
+}
+
+.xmodule_display.xmodule_VideoBlock .a11y-menu-container .a11y-menu-list li a {
+    display: block;
+    overflow: hidden;
+    text-overflow: ellipsis;
+    white-space: nowrap;
+    color: var(--gray-l2);
+    font-size: 14px;
+    line-height: 23px;
+}
+
+.xmodule_display.xmodule_VideoBlock .a11y-menu-container .a11y-menu-list li a:hover, .xmodule_display.xmodule_VideoBlock .a11y-menu-container .a11y-menu-list li a:focus {
+    color: var(--gray-d1);
+}
+
+.xmodule_display.xmodule_VideoBlock .a11y-menu-container .a11y-menu-list li.active a {
+    color: #009fe6;
+}
+
+.xmodule_display.xmodule_VideoBlock .a11y-menu-container .a11y-menu-list li:last-child {
+    box-shadow: none;
+    border-bottom: 0;
+    margin-top: 0;
+}
+
+.xmodule_display.xmodule_VideoBlock .video-tracks .a11y-menu-container {
+    display: inline-block;
+    vertical-align: top;
+    border-left: 1px solid #eee;
+}
+
+.xmodule_display.xmodule_VideoBlock .video-tracks .a11y-menu-container.open > a {
+    background-color: var(--action-primary-active-bg);
+    color: var(--very-light-text);
+}
+
+.xmodule_display.xmodule_VideoBlock .video-tracks .a11y-menu-container.open > a::after {
+    color: var(--very-light-text);
+}
+
+.xmodule_display.xmodule_VideoBlock .video-tracks .a11y-menu-container > a {
+    transition: all var(--tmg-f2) ease-in-out 0s;
+    font-size: 12px;
+    display: block;
+    border-radius: 0 3px 3px 0;
+    background-color: var(--very-light-text);
+    padding: calc((var(--baseline) * 0.75)) calc((var(--baseline) * 1.25)) calc((var(--baseline) * 0.75)) calc((var(--baseline) * 0.75));
+    color: var(--gray-l2);
+    min-width: 1.5em;
+    line-height: 14px;
+    text-align: center;
+    overflow: hidden;
+    text-overflow: ellipsis;
+}
+
+.xmodule_display.xmodule_VideoBlock .video-tracks .a11y-menu-container > a::after {
+    content: "\f0d7";
+    position: absolute;
+    right: calc((var(--baseline) * 0.5));
+    top: 33%;
+    color: var(--lighter-base-font-color);
+}
+
+.xmodule_display.xmodule_VideoBlock .video-tracks .a11y-menu-container .a11y-menu-list {
+    right: 0;
+}
+
+.xmodule_display.xmodule_VideoBlock .video-tracks .a11y-menu-container .a11y-menu-list li {
+    font-size: 0.875em;
+}
+
+.xmodule_display.xmodule_VideoBlock .video-tracks .a11y-menu-container .a11y-menu-list li a {
+    border: 0;
+    display: block;
+    padding: 0.70788em;
+    overflow: hidden;
+    text-overflow: ellipsis;
+    white-space: nowrap;
+}
+
+.xmodule_display.xmodule_VideoBlock .contextmenu,
+.xmodule_display.xmodule_VideoBlock .submenu {
+    border: 1px solid #333;
+    background: var(--white);
+    color: #333;
+    padding: 0;
+    margin: 0;
+    list-style: none;
+    position: absolute;
+    top: 0;
+    display: none;
+    outline: none;
+    cursor: default;
+    white-space: nowrap;
+}
+
+.xmodule_display.xmodule_VideoBlock .contextmenu.is-opened,
+.xmodule_display.xmodule_VideoBlock .submenu.is-opened {
+    display: block;
+}
+
+.xmodule_display.xmodule_VideoBlock .contextmenu .menu-item,
+.xmodule_display.xmodule_VideoBlock .contextmenu .submenu-item,
+.xmodule_display.xmodule_VideoBlock .submenu .menu-item,
+.xmodule_display.xmodule_VideoBlock .submenu .submenu-item {
+    border-top: 1px solid var(--gray-l3);
+    padding: calc((var(--baseline) / 4)) calc((var(--baseline) / 2));
+    outline: none;
+}
+
+.xmodule_display.xmodule_VideoBlock .contextmenu .menu-item > span,
+.xmodule_display.xmodule_VideoBlock .contextmenu .submenu-item > span,
+.xmodule_display.xmodule_VideoBlock .submenu .menu-item > span,
+.xmodule_display.xmodule_VideoBlock .submenu .submenu-item > span {
+    color: #333;
+}
+
+.xmodule_display.xmodule_VideoBlock .contextmenu .menu-item:first-child,
+.xmodule_display.xmodule_VideoBlock .contextmenu .submenu-item:first-child,
+.xmodule_display.xmodule_VideoBlock .submenu .menu-item:first-child,
+.xmodule_display.xmodule_VideoBlock .submenu .submenu-item:first-child {
+    border-top: none;
+}
+
+.xmodule_display.xmodule_VideoBlock .contextmenu .menu-item:focus,
+.xmodule_display.xmodule_VideoBlock .contextmenu .submenu-item:focus,
+.xmodule_display.xmodule_VideoBlock .submenu .menu-item:focus,
+.xmodule_display.xmodule_VideoBlock .submenu .submenu-item:focus {
+    background: #333;
+    color: var(--white);
+}
+
+.xmodule_display.xmodule_VideoBlock .contextmenu .menu-item:focus > span,
+.xmodule_display.xmodule_VideoBlock .contextmenu .submenu-item:focus > span,
+.xmodule_display.xmodule_VideoBlock .submenu .menu-item:focus > span,
+.xmodule_display.xmodule_VideoBlock .submenu .submenu-item:focus > span {
+    color: var(--white);
+}
+
+.xmodule_display.xmodule_VideoBlock .contextmenu .submenu-item,
+.xmodule_display.xmodule_VideoBlock .submenu .submenu-item {
+    position: relative;
+    padding: calc((var(--baseline) / 4)) var(--baseline) calc((var(--baseline) / 4)) calc((var(--baseline) / 2));
+}
+
+.xmodule_display.xmodule_VideoBlock .contextmenu .submenu-item::after,
+.xmodule_display.xmodule_VideoBlock .submenu .submenu-item::after {
+    content: '\25B6';
+    position: absolute;
+    right: 5px;
+    line-height: 25px;
+    font-size: 10px;
+}
+
+.xmodule_display.xmodule_VideoBlock .contextmenu .submenu-item .submenu,
+.xmodule_display.xmodule_VideoBlock .submenu .submenu-item .submenu {
+    display: none;
+}
+
+.xmodule_display.xmodule_VideoBlock .contextmenu .submenu-item.is-opened,
+.xmodule_display.xmodule_VideoBlock .submenu .submenu-item.is-opened {
+    background: #333;
+    color: var(--white);
+}
+
+.xmodule_display.xmodule_VideoBlock .contextmenu .submenu-item.is-opened > span,
+.xmodule_display.xmodule_VideoBlock .submenu .submenu-item.is-opened > span {
+    color: var(--white);
+}
+
+.xmodule_display.xmodule_VideoBlock .contextmenu .submenu-item.is-opened > .submenu,
+.xmodule_display.xmodule_VideoBlock .submenu .submenu-item.is-opened > .submenu {
+    display: block;
+}
+
+.xmodule_display.xmodule_VideoBlock .contextmenu .submenu-item .is-selected,
+.xmodule_display.xmodule_VideoBlock .submenu .submenu-item .is-selected {
+    font-weight: bold;
+}
+
+.xmodule_display.xmodule_VideoBlock .contextmenu .is-disabled,
+.xmodule_display.xmodule_VideoBlock .submenu .is-disabled {
+    pointer-events: none;
+    color: var(--gray-l3);
+}
+
+.xmodule_display.xmodule_VideoBlock .overlay {
+    position: fixed;
+    top: 0;
+    left: 0;
+    right: 0;
+    bottom: 0;
+    background-color: transparent;
+}
diff --git a/xmodule/static/css-builtin-blocks/VideoBlockEditor.css b/xmodule/static/css-builtin-blocks/VideoBlockEditor.css
new file mode 100644
index 00000000000..4a570a5fec8
--- /dev/null
+++ b/xmodule/static/css-builtin-blocks/VideoBlockEditor.css
@@ -0,0 +1,167 @@
+@import url("https://fonts.googleapis.com/css?family=Open+Sans:300,400,400i,600,700");
+
+.xmodule_edit.xmodule_VideoBlock {
+}
+
+.xmodule_edit.xmodule_VideoBlock .ui-col-wide {
+    width: 74.46809%;
+    margin-right: 2.12766%;
+    float: left;
+}
+
+.xmodule_edit.xmodule_VideoBlock .ui-col-narrow {
+    width: 23.40426%;
+    float: left;
+}
+
+.xmodule_edit.xmodule_VideoBlock .ui-loading {
+    box-shadow: inset 0 1px 2px 1px rgba(0, 0, 0, 0.2);
+    padding: 15px 20px;
+}
+
+.xmodule_edit.xmodule_VideoBlock .ui-loading {
+    animation: fadeIn 0.25s linear 1;
+    opacity: 0.6;
+    background-color: #fff;
+    padding: 30px 20px;
+    text-align: center;
+}
+
+.xmodule_edit.xmodule_VideoBlock .ui-loading .spin {
+    display: inline-block;
+}
+
+.xmodule_edit.xmodule_VideoBlock .ui-loading .copy {
+    padding-left: 5px;
+}
+
+.xmodule_edit.xmodule_VideoBlock .is-hidden {
+    display: none;
+}
+
+.xmodule_edit.xmodule_VideoBlock .tabs-wrapper {
+    padding-top: 0;
+    position: relative;
+}
+
+.xmodule_edit.xmodule_VideoBlock .tabs-wrapper .wrapper-comp-settings {
+    display: block;
+}
+
+.xmodule_edit.xmodule_VideoBlock .editor-single-tab-name {
+    display: none;
+}
+
+.xmodule_edit.xmodule_VideoBlock .editor-with-tabs {
+    position: relative;
+}
+
+.xmodule_edit.xmodule_VideoBlock .editor-with-tabs:after {
+    content: "";
+    display: table;
+    clear: both;
+}
+
+.xmodule_edit.xmodule_VideoBlock .editor-with-tabs .edit-header {
+    box-sizing: border-box;
+    padding: 18px var(--baseline);
+    top: 0 !important;
+    right: 0;
+    background-color: var(--blue);
+    border-bottom: 1px solid var(--blue-d2);
+    color: var(--white);
+}
+
+.xmodule_edit.xmodule_VideoBlock .editor-with-tabs .edit-header .component-name {
+    position: relative;
+    top: 0;
+    left: 0;
+    width: 50%;
+    color: var(--white);
+    font-weight: 600;
+}
+
+.xmodule_edit.xmodule_VideoBlock .editor-with-tabs .edit-header .component-name em {
+    display: inline-block;
+    margin-right: calc((var(--baseline) / 4));
+    font-weight: 400;
+    color: var(--white);
+}
+
+.xmodule_edit.xmodule_VideoBlock .editor-with-tabs .edit-header .editor-tabs {
+    list-style: none;
+    right: 0;
+    top: calc((var(--baseline) / 4));
+    position: absolute;
+    padding: 12px calc((var(--baseline) * 0.75));
+}
+
+.xmodule_edit.xmodule_VideoBlock .editor-with-tabs .edit-header .editor-tabs .inner_tab_wrap {
+    display: inline-block;
+    margin-left: 8px;
+}
+
+.xmodule_edit.xmodule_VideoBlock .editor-with-tabs .edit-header .editor-tabs .inner_tab_wrap a.tab {
+    font-size: 14px;
+    font-size: 1.4rem;
+    background-color: rgba(255, 255, 255, 0.3);
+    background-image: -webkit-linear-gradient(top, rgba(255, 255, 255, 0.3), rgba(255, 255, 255, 0));
+    background-image: linear-gradient(to bottom, rgba(255, 255, 255, 0.3), rgba(255, 255, 255, 0));
+    border: 1px solid var(--blue-d1);
+    border-radius: 3px;
+    padding: calc((var(--baseline) / 4)) var(--baseline);
+    background-color: var(--blue);
+    font-weight: bold;
+    color: var(--white);
+}
+
+.xmodule_edit.xmodule_VideoBlock .editor-with-tabs .edit-header .editor-tabs .inner_tab_wrap a.tab.current {
+    background-color: var(--blue);
+    background-image: -webkit-linear-gradient(var(--blue), var(--blue));
+    background-image: linear-gradient(to, var(--blue));
+    color: var(--blue-d1);
+    box-shadow: inset 0 1px 2px 1px var(--shadow-l1);
+    background-color: var(--blue-d4);
+    cursor: default;
+}
+
+.xmodule_edit.xmodule_VideoBlock .editor-with-tabs .edit-header .editor-tabs .inner_tab_wrap a.tab:hover, .xmodule_edit.xmodule_VideoBlock .editor-with-tabs .edit-header .editor-tabs .inner_tab_wrap a.tab:focus {
+    box-shadow: inset 0 1px 2px 1px var(--shadow);
+    background-image: linear-gradient(#009fe6, #009fe6) !important;
+}
+
+.xmodule_edit.xmodule_VideoBlock .editor-with-tabs .is-inactive {
+    display: none;
+}
+
+.xmodule_edit.xmodule_VideoBlock .editor-with-tabs .comp-subtitles-entry {
+    text-align: center;
+}
+
+.xmodule_edit.xmodule_VideoBlock .editor-with-tabs .comp-subtitles-entry .file-upload {
+    display: none;
+}
+
+.xmodule_edit.xmodule_VideoBlock .editor-with-tabs .comp-subtitles-entry .comp-subtitles-import-list > li {
+    display: block;
+    margin: calc(var(--baseline) / 2) 0;
+}
+
+.xmodule_edit.xmodule_VideoBlock .editor-with-tabs .comp-subtitles-entry .comp-subtitles-import-list .blue-button {
+    font-size: 1em;
+    display: block;
+    width: 70%;
+    margin: 0 auto;
+    text-align: center;
+}
+
+.xmodule_edit.xmodule_VideoBlock .component-tab {
+    background: var(--white);
+    position: relative;
+    border-top: 1px solid #8891a1;
+}
+
+.xmodule_edit.xmodule_VideoBlock .component-tab#advanced {
+    padding: 0;
+    border: none;
+}
diff --git a/xmodule/tests/test_util_builtin_assets.py b/xmodule/tests/test_util_builtin_assets.py
index bc26bed3d6b..8fcc300f264 100644
--- a/xmodule/tests/test_util_builtin_assets.py
+++ b/xmodule/tests/test_util_builtin_assets.py
@@ -1,6 +1,9 @@
 """
 Tests for methods defined in builtin_assets.py
 """
+from pathlib import PosixPath
+
+from django.conf import settings
 from unittest import TestCase
 from unittest.mock import patch
 
@@ -66,3 +69,52 @@ def test_happy_path(self):
             mimetype='text/css',
             placement='head',
         )
+
+
+class AddCssToFragmentTests(TestCase):
+    """
+    Tests for add_css_to_fragment.
+    """
+
+    def test_absolute_path_raises_value_error(self):
+        fragment = Fragment()
+        with self.assertRaises(ValueError):
+            builtin_assets.add_css_to_fragment(
+                fragment,
+                "/openedx/edx-platform/xmodule/assets/VideoBlockEditor.css",
+            )
+
+    def test_not_css_raises_value_error(self):
+        fragment = Fragment()
+        with self.assertRaises(ValueError):
+            builtin_assets.add_css_to_fragment(
+                fragment,
+                "vertical/public/js/vertical_student_view.js"
+            )
+
+    def test_misspelled_path_raises_not_found(self):
+        fragment = Fragment()
+        with self.assertRaises(FileNotFoundError):
+            builtin_assets.add_css_to_fragment(
+                fragment,
+                "VideoBlockEditorrrrr.css",
+            )
+
+    def test_static_file_missing_raises_improperly_configured(self):
+        fragment = Fragment()
+        with patch.object(builtin_assets, 'get_static_file_url', lambda _path: None):
+            with self.assertRaises(ImproperlyConfigured):
+                builtin_assets.add_css_to_fragment(
+                    fragment,
+                    "VideoBlockEditor.css",
+                )
+
+    def test_happy_path(self):
+        fragment = Fragment()
+        builtin_assets.add_css_to_fragment(fragment, "VideoBlockEditor.css")
+        assert fragment.resources[0] == FragmentResource(
+            kind='url',
+            data='/static/css-builtin-blocks/VideoBlockEditor.css',
+            mimetype='text/css',
+            placement='head',
+        )
diff --git a/xmodule/util/builtin_assets.py b/xmodule/util/builtin_assets.py
index aaedc44cc64..d37996b25d6 100644
--- a/xmodule/util/builtin_assets.py
+++ b/xmodule/util/builtin_assets.py
@@ -12,6 +12,38 @@
 from openedx.core.djangoapps.theming.helpers_static import get_static_file_url
 
 
+def add_css_to_fragment(fragment, css_relative_path):
+    """
+    Given a css path relative to xmodule/assets, add a compiled CSS URL to the fragment.
+
+    Raises:
+    * ValueError if {css_relative_path} is absolute or does not end in '.css'.
+    * FileNotFoundError if edx-platform/xmodule/assets/{css_relative_path} is missing.
+    * ImproperlyConfigured if the lookup of the static CSS URL fails. This could happen
+      if CSS wasn't collected, or the staticfiles app is misconfigured.
+
+    Notes:
+    * This function is theme-aware. That is: If a theme is enabled which provides a compiled
+      CSS file of the same name, then that CSS file will be used instead.
+    """
+    if not isinstance(css_relative_path, Path):
+        css_relative_path = Path(css_relative_path)
+    if css_relative_path.is_absolute():
+        raise ValueError(f"css_file_name should be relative; is absolute: {css_relative_path}")
+    if css_relative_path.suffix != '.css':
+        raise ValueError(f"css_file_name should be .css file; is: {css_relative_path}")
+    css_absolute_path = Path(settings.REPO_ROOT) / "xmodule" / "static" / "css-builtin-blocks" / css_relative_path
+    if not css_absolute_path.is_file():
+        raise FileNotFoundError(f"css file not found: {css_absolute_path}")
+    css_static_path = Path('css-builtin-blocks') / css_relative_path.with_suffix('.css')
+    css_url = get_static_file_url(str(css_static_path))  # get_static_file_url is theme-aware.
+    if not css_url:
+        raise ImproperlyConfigured(
+            f"Did not find static CSS file {css_static_path} in staticfiles storage. Perhaps it wasn't collected?"
+        )
+    fragment.add_css_url(css_url)
+
+
 def add_sass_to_fragment(fragment, sass_relative_path):
     """
     Given a Sass path relative to xmodule/assets, add a compiled CSS URL to the fragment.
diff --git a/xmodule/video_block/video_block.py b/xmodule/video_block/video_block.py
index 782645c373b..ea9d1a44280 100644
--- a/xmodule/video_block/video_block.py
+++ b/xmodule/video_block/video_block.py
@@ -48,7 +48,7 @@
 from xmodule.modulestore.inheritance import InheritanceKeyValueStore, own_metadata
 from xmodule.raw_block import EmptyDataRawMixin
 from xmodule.validation import StudioValidation, StudioValidationMessage
-from xmodule.util.builtin_assets import add_webpack_js_to_fragment, add_sass_to_fragment
+from xmodule.util.builtin_assets import add_webpack_js_to_fragment, add_css_to_fragment
 from xmodule.video_block import manage_video_subtitles_save
 from xmodule.x_module import (
     PUBLIC_VIEW, STUDENT_VIEW,
@@ -242,7 +242,7 @@ def student_view(self, context):
         Return the student view.
         """
         fragment = Fragment(self.get_html(context=context))
-        add_sass_to_fragment(fragment, 'VideoBlockDisplay.scss')
+        add_css_to_fragment(fragment, 'VideoBlockDisplay.css')
         add_webpack_js_to_fragment(fragment, 'VideoBlockDisplay')
         shim_xmodule_js(fragment, 'Video')
         return fragment
@@ -260,7 +260,7 @@ def studio_view(self, _context):
         fragment = Fragment(
             self.runtime.service(self, 'mako').render_cms_template(self.mako_template, self.get_context())
         )
-        add_sass_to_fragment(fragment, 'VideoBlockEditor.scss')
+        add_css_to_fragment(fragment, 'VideoBlockEditor.css')
         add_webpack_js_to_fragment(fragment, 'VideoBlockEditor')
         shim_xmodule_js(fragment, 'TabsEditingDescriptor')
         return fragment
@@ -276,7 +276,7 @@ def public_view(self, context):
             return self.student_view(context)
 
         fragment = Fragment(self.get_html(view=PUBLIC_VIEW, context=context))
-        add_sass_to_fragment(fragment, 'VideoBlockDisplay.scss')
+        add_css_to_fragment(fragment, 'VideoBlockDisplay.css')
         add_webpack_js_to_fragment(fragment, 'VideoBlockDisplay')
         shim_xmodule_js(fragment, 'Video')
         return fragment