Video Info Viewer is an open source app that allows you to view metadata about videos on your Android devices. You can view the atom structure of the MPEG-4 file format, and inspect resolution, frame rate, and more.
Video Info Viewer is released under the Apache License, Version 2.0. See [LICENSE.md] (https://github.com/hoolrory/VideoInfoViewer/blob/master/LICENSE.md).
In the Google Play Store: https://play.google.com/store/apps/details?id=com.roryhool.videoinfoviewer
Also available for iOS: https://github.com/hoolrory/VideoInfoViewer-iOS