feat(web): loop video thumbnails

[lukashass]

Feels a lot more natural IMO.

[alextran1502]

so it will loop like a gif?

[zackpollard]

so it will loop like a gif?

Yea it will just play again once it ends, LGTM, seems like a nice change

[Krolitian]

What if we have it enable looping only after clicking the restart button at the end of a video, and then it loops endlessly? It lets people enable looping videos without an additional toggle and lets other people not have their videos loop by default.

[jrasm91]

We could also add this to a user setting (whether to auto-loop videos or not) and then just reference the store here.