Impervious (Chromium) on macOS plays that video.
The video is .mov and it seems that Chrome does not handle mov-files. If you copy-paste the video file to Chrome URL-box it just downloads the file (at least on Brave).
Discussion
That makes sense. You'd think Chrome + macOS would be fine w/.mov since, afaik MOV only exists because of Apple! Actually, I guess the real test in that case would be Safari.
It seems to be the case that Chrome does not like mov: