This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Mulongo oyo etiyamaki na archive. Tuna motuna mosusu soki osengeli na lisalisi

Codec not supported: video/mp4

  • 1 eyano
  • 1 eza na nkokoso oyo
  • 18 views
  • Eyano yasuka ya Mad Maks

more options

Hi, I recently reinstalled mozilla (formatted my PC) and now I can't play embedded videos (twitter, reddit, twitch, etc.), but it can on YouTube. In the element inspector I have the following error "codec not supported: video / mp4". I have a Windows 11 OS and the latest version of Firefox. Thank you very much for the help.

Hi, I recently reinstalled mozilla (formatted my PC) and now I can't play embedded videos (twitter, reddit, twitch, etc.), but it can on YouTube. In the element inspector I have the following error "codec not supported: video / mp4". I have a Windows 11 OS and the latest version of Firefox. Thank you very much for the help.

All Replies (1)

more options

hi,

maybe this articel can help you https://support.mozilla.org/en-US/kb/fix-video-audio-problems-firefox-windows

greetings Tim Maks