Scheduled maintenance: Thursday, September 24, between 11:30am and 13:30pm UTC. 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

搜尋 Mozilla 技術支援網站

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

Броузер не показывает видео с канала Ютуб. Броузер не распознает ни один из доступных видеоформатов.

  • 2 回覆
  • 1 有這個問題
  • 6 次檢視
  • 最近回覆由 James

more options

Can't see video from YouTube site. An alarm image show, that му browser recognizes none of accessible videoformats. Sorry, I can't load the alarm image! Best regards, Vladimir Popov.

所有回覆 (2)

more options

Are you watching Russian based youtube video or other Regions? Or whomever made it used unrecognized format so it doesn't work.

more options

Vldmr said

Can't see video from YouTube site.

Are you indeed still using the old EOL Windows XP ?

This is the reason why you cannot fully use HTML5 players like used by Youtube.

Go to https://www.youtube.com/html5/ as you will likely have three red check marks when all should be blue ideally.

The problem is Microsoft did not support Windows XP and they do with Vista and later with the media feature packs that codecs the codes needed by HTML5 players.

The problem is Microsoft did not support Windows XP as they do with Vista and later with the media feature packs that provided needed codecs used by HTML5 players.

This is for Windows Vista and later users but explains what I mean about the packs. https://support.mozilla.org/en-US/kb/fix-video-audio-problems-firefox-windows

You can see the limit of what you support at https://www.youtube.com/html5/ as you likely have three red check marks instead of all being blue.

With some work you may be able to support HTML5 players better in Firefox 52 ESR on WinXP. https://msfn.org/board/topic/175591-enable-mp4-h264-aac-html5-video-in-firefox-on-windows-xp-without-flash/

The only way you will be able to fully support HTML5 players and current Firefox versions is to use Windows 7 or later or dual boot with a light 32-bit Linux distro like Lubuntu or Xubuntu among others.