Videos not working in Google Chrome

I uploaded videos to comments in a Github issue and in Google Chrome this is what I see:

I can’t play the videos, even if I open the links behind them directly.

In Safari the videos work fine.

macOS 11.3 (20E232), Chrome Version 90.0.4430.93 (Official Build) (x86_64)


I’ve tried uploading an mp4 to an issue comment and it’s working as expected.

I’d recommend trying in an incognito window, or with all your extensions turned off in case that’s interfering with video playback.

If that doesn’t work, and it’s a public repository, could you link to it here?