[Fixed] No video with supported format and MIME type found

If you see this error message: “No video with supported format and MIME type found” when trying to play a video, don’t panic. This is a common error usually happening in Firefox. You can fix the error with the solutions below.

Why does the error happen?

This error occurs on some browsers, especially in Firefox. Sometimes it’s because of the outdated browser version, and another main reason is your browser doesn’t support the format of the video type.

The error “No video with supported format and MIME type found” is generally about the HTML5 media player, so you should also check if your browser supports playing the media files in this format.

How to fix the error?

Here are the solutions you can try. You shouldn’t have to try them all. Just try each one in turn until everything’s working again.

1. Update your browser
2. Clear browser cookies and cache
3. Disable browser add-ons
4. Try another browser

Fix 1: Update your browser

Since many technical issues can be fixed by restarting, it never hurts to restart your Firefox or other browser that gave you the error. Sometimes this is enough to fix your issue.

In addition, the outdated browser version can cause bug issues, and that’s why the developer keeps releasing updates to fix issues and improve your experience. So you should simply check if there is any update in your browser, and install the latest update to keep your browser up to date.

After the update, try playing the video again to see if it fixes the error.

Fix 2: Clear browser cookies and cache

Clearing browser cookies and cache can help fix the “No video with supported format and MIME type found” error. Here’s what to do:

Kindly note that clearing cookies and cache will log out the websites.

1) Go to Firefox Options by click the Options button, or you can type about:preferences in the address bar then press Enter.

2) Click Privacy & Security on the left.

3) In the History section, click the Clear History button.

4) In the popup dialog, select Everything and click Clear Now.

5) Still under the History section, click Clear Data.

6) Click Clear again to confirm.

After that, restart your Firefox and try again to see if the error disappears.

Fix 3: Disable browser add-ons

As you may know, the extensions in your browser may not be compatible with the video, so you see the error “No video with supported format and MIME type found”. You can temporarily disable the extensions in your browser to locate the problem.

1) Go to Add-ons in your browser, or you can type about:addons in the address bar then press Enter.

2) Click Extensions on the left, and disable the add-ons you’ve installed.

3) Try playing the video again to see if the error has been fixed.

If the error disappears, then you should have found and fixed the issue.

You can try enabling one extension in a time and see if the error happens again, so you can see which extension causes the problem, and uninstall the extension.

Fix 4: Try another browser

It’s likely that your browser doesn’t support the video format, so you can try a different browser to play the video, such as Google Chrome or Microsoft Edge.

There is another way to play the video: convert the video format to a common format that is supported by many browsers, such as .MP4. But you’ll need to use a third-party tool to convert your video first.

That’s it. Hope this post helps in resolving your error “No video with supported format and MIME type found”. You’re welcome to leave a comment and let us know which solution helps. If you have any questions, feel free to comment below and we’ll see what more we can do.

By Lillian Lai

Lillian, a Microsoft Certified Professional (MCP), is a technology enthusiast, longing to share the technical tips and solutions to computer problems. Also as a person who enjoys writing, she’s found the perfect match for writing and technology. When she’s not writing, you’ll find her either reading or playing mobile games.

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