Sorry, I was wrong about Firefox's built-in support for H.264 video. It is only used for WebRTC (a type of in-browser videoconferencing).
As Olivier said, installing libavcodec57 (or installing ffmpeg) will provide the H.264 decoding capability that you need to view this video and many others on YouTube and other sites. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to firefox in Ubuntu. https://bugs.launchpad.net/bugs/1916301 Title: I can't play live videos on YouTube (problem with live transmission) - Ubuntu 18.04.5 Status in firefox package in Ubuntu: Incomplete Bug description: Dear Launchpad Team, I can't play live videos from Youtube. I have problem only with live transmission. Normal videos works fine. I noticed that I also have this same problem on Focal (now I checked this on Bionic - Ubuntu 18.04.5). On Lubuntu 18.04.5 on other machine I don't have this problem. I can play on Lubuntu all Youtube videos. What is a problem? Do you know? I think that by default Ubuntu have not necessary package to play live videos on Youtube. Have I right or this is a bug? On Answers section on launchpad anyone can't tell me if it is a bug so this is why I report this bug now. If it is not a bug I am very sorry and you can delete this report now. Example I have problem with this video: https://www.youtube.com/watch?v=21X5lGlDOfg I used debugger by youtube and this is output of this: "debug_error": { "errorCode": "html5.unsupportedlive", "errorMessage": "Ten format wideo nie jest obsługiwany.", "Nx": "HTML5_NO_AVAILABLE_FORMATS_FALLBACK", "cj": ""," If it is a bug can you fix it? UPDATE: Today I updated my firefox to the newest version 86.0. This bug still exists. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1916301/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
