Fix 'No Video with Supported Format and MIME Type Found' Error (2024)

Summary: Firefox reports the error 'No video with supported format and MIME type found'. What goes wrong and how to fix it? Check out the post and learn the answer!

A considerable number of Firefox users repeatedly face denied access to video content, and the frustrating prompt message "No video with supported format and MIME type found" pops up on their screens. This HTML5 media player error is prevalent across various platforms, including Ubuntu Linux, Facebook, Twitter, and more. So, how do we go about addressing the 'No video with supported format and MIME found' error? In this post, we'll delve into the issue and unveil some top-notch workarounds to help you tackle the problem.

What Causes the No Video with Supported Format and MIME Type Found Error

The error message 'no video with supported format and mime type found' first appeared in the third quarter of 2019, coinciding with the release of Firefox version 68 or 69, and then hit Firefox users even more often later The error indicates that the browser is unable to play the video content due to a lack of specific functionality. And the reasons leading to the issue are but not limited to:

• Outdated browsers: The advent of HTML5 has posed challenges for older browsers, as they struggle to keep up with the latest standards and features. The struggle then manifests in the form of errors message 'no video with supported format and mime type found'. Besides, unresolved bugs and lingering issues from previous browser versions can persist, even after subsequent updates have attempted to resolve them. Consequently, these factors collectively contribute to the difficulties faced by outdated browsers when delivering smooth video playback.
• Corrupted cookies and caches: Cache, designed to enhance the overall loading speed of web pages in browsers, can inadvertently hinder your browsing experience if not cleared periodically, and lead to the error 'No video with supported format and MIME type found'.
• The lack of Media Feature Pack for Windows KN/N edition: The N and KN editions of Windows do not include certain media-related technologies that Firefox relies on to play media content. This absence can be a significant factor contributing to the no video with supported format and mime type of playback error.
• Intrusive extensions: Certain plugins and extensions have been known to slow the browser down or interrupt the normal video display online.

Note: You may come across the narrative in some post that the Adobe Flash Player could be responsible for the "no video with supported format and MIME type found" error. This notion was reasonable in the past when Flash was widely used for online multimedia content. However, it is important to note that Adobe officially announced the discontinuation of Flash Player in January 2021, leading to major websites permanently removing Flash support.

As a result, modern web technologies, such as HTML5 and native browser video players, have taken over as the standard for delivering multimedia content. Consequently, if you encounter the 'no video with supported format and MIME type found' error, it is unlikely to be caused by Adobe Flash Player, especially on websites that have migrated away from Flash.

Another situation to dwell on is the incompatible video format. If the browser having issue with certain video formats, try use VideoProc Converter AI – the best video converter to convert videos to the right format and play them in browser.

How to Solve No Video with Supported Format and MIME Type Found Error

1. Clear Cache and Cookies

Clearing the stored data in your browser cache can indeed prompt the browser to fetch the most up-to-date webpage elements instead of relying on previously cached components. This can contribute to a smoother video playback experience. In particular, if you notice that the video plays flawlessly in private mode, it suggests that accumulated caches could be the source of the 'no video supported and mime type found' problem.

Step 1. Go to the menu button in the top right corner > Settings.

Step 2. Select Privacy and Security seated on the left navigation panel.

Step 3. Click on Cookies and Site Date, click on Clear Data button; check all the options, and click Clear.

Step 4. Scroll down to History, change the time range to Everything; enable all the checkboxes, and Click OK.

Note: Since the action will delete all the data of your logins, make sure you back up the important information including passwords.

2. Install Media Feature Pack for Windows KN/N edition

To ensure proper functionality for playing media content in the N and KN editions of Windows, end users need to enable the necessary media features by installing the Media Feature Pack specifically designed for these versions. The N and KN editions exclude certain media-related programs and components by default due to regulatory or legal requirements.

Step 1. Go to the Media Feature Pack download page.

Step 2. Select a proper language, and click the Download button to start download. Restart your computer to see if the Firefox "No video with supported format and MIME found" error is fixed.

3. Update Firefox or reinstall Firefox

To ensure a smooth browsing experience and address potential playback errors like 'no video with supported format and mime type found', it is crucial to keep your browser up to date.

For Firefox, go to the Menu > Help, and in the Help window, opt for About Firefox, and wait for the browser to check if any update is available. Or you could simply reinstall Firefox. Press Windows + R, type in "appwiz.cpl" and press Enter. As the Program and Features page pops up, locate Mozilla Firefox, right-select it and click Uninstall. Then navigate to the Firefox download page to download the latest Firefox. After completing the actions, launch the browser again, and the problem should have vanished.

4. Disable Add-ons on Firefox

If you are experiencing with the 'no video with supported format and mime type found' playback issue in Firefox, it is worth considering disabling all extensions and plugins installed on your browser. Sometimes, extensions or plugins can introduce features that conflict with the default functionality of the browser, causing problems with video playback.

Step 1. Go to the menu button, click Add-ons and Themes and select Extensions.

Step 2. Scroll through the list of extensions, and remove the extensions you wish to remove by clicking three-dot icon > Remove.

5. Use another browser

For the last resort, try to migrate to another browser like Chrome if you fail in every possible solution presented above. Boasting a strong compatibility notably with the web markup standard HTML5, Chrome is a great web alternatives to go when it comes to streaming videos.

Tip:

If none of the above-mentioned remedies fix the "No video with supported format and MIME type found" error, it could be the incompatible video format or incongruous codec that induce the problem. And if that is the case, you are suggested to convert the video to the format agreed in the browser, and this is where VideoProc Converter AI comes to aid, the best video converter that answers all your transcoding needs while optimizing the file size and more.

Free Download For Win 7 or later

Free Download For Mac OS X 10.6 or later

For mobile users, click here >

Note: The Windows version now supports AI-powered Super Resolution, Frame Interpolation, and Stabilization to enhance video and image quality. These AI features are not yet available in the Mac version but will be coming soon.