Update README.md (link fix)

README.md

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 ## Update: Watch [50:57 - 51:55](https://youtu.be/ndtJ78CGbKY?t=3057) for Demo with Comparison on Spot
 
-[<img src='https://github.com/h2r/sloop/assets/7720184/45b70f09-de03-4279-b62a-029fe86814c1' width='600px'/>](https://youtu.be/ndtJ78CGbKY?t=3057)
+Click image below to watch video on Youtube.
 
-Click image above to watch video on Youtube.
+[<img src='https://i.imgur.com/D5TK5cj.png' width='600px'/>](https://youtu.be/ndtJ78CGbKY?t=3057)
 
 # [**Spatial Language Understanding for Object Search in Partially Observed City-scale Environments**](https://arxiv.org/abs/2012.02705)
 [Kaiyu Zheng](https://kaiyuzheng.me/),