tor-browser-9.0.10 can't deal with mp4 and mp3 encodings or any of the other codecs supported by ffmpeg. Atleast in my case it doesn't. I would like if people can confirm this. It deals just fine with native codecs.
The web-console: Specified type attribute of video/mp4; codecs="avc1.64001F, mp4a.40.2" is not supported. Load of media resource /latest_version?id=pokaDA2Img8&itag=22&local=true failed. All candidate resources failed to load. Media load paused. The video on this page cant be played. Your system may not have the required video codecs for: video/mp4; codecs="avc1.64001F mp4a.40.2", video/mp4; codecs="avc1.42001E mp4a.40.2" 'update-mime-database /usr/local/share/mime' was of no avail about:config atleast shows ffmpeg / mp4 is enabled
