Visualize dataset fix slider

[mishig25]

Description

Fix slider issue by loading the videos from hf.co rather than serving the videos locally. Which means the way the local server was serving videos/media made it not possible to use scroller

https://github.com/huggingface/lerobot/blob/885cb9ddeba2f4602fd2ed62ed04268e58b54821/lerobot/scripts/visualize_dataset.py#L78-L84

Screen recordings

on branch user/rcadene/2024_05_17_improve_visualize_dataset

https://github.com/huggingface/lerobot/assets/11827707/e8848485-1396-4708-b956-e4252cb4a4db

this branch/PR

https://github.com/huggingface/lerobot/assets/11827707/d8ed411b-fba3-4acd-ac18-4a696154926f

cc: @Cadene