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.

Avatar for Username

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

This thread was archived. Please ask a new question if you need help.

error playing some videos "no video with supported mime type found"

  • 2 replies
  • 12 have this problem
  • 8 views
  • Last reply by cor-el

hass71
hass71
more options

after upgrading to version 35 i get error playing some videos "no video with supported mime type found" video type mp4

after upgrading to version 35 i get error playing some videos "no video with supported mime type found" video type mp4

All Replies (2)

guigs
guigs
more options

Do you have OpenH264 Video Codec provided by Cisco Systems, Inc. installed in about:plugins ?

To reset the mimetypes you can try to change the mimetype that cannot be found with these instructions:

Modified by guigs

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

This means that the HTML5 media player is used, but your computer doesn't have support for the various media files that are available. This may be a missing codec or basic MP4 support.

You can open the Web Console (Firefox/Tools > Web Developer) for error messages.

See also Windows Media Feature Pack for N and KN versions of all Windows 8 editions in case you use such a Windows version: