How to Fix HTML5 Video Not Found on Your Browsers (2024)

December 12, 2023Jenny Ryan

Repair Video

It is frustrating to see an ‘HTML5 video not Found’ message on your screen. What should be a time to watch an important matter turns to disappointment and confusion. You did your best to find out why the video is not loading on your computer, but even if you find the cause, you can only reach a few solutions. So, this post is here to help you go beyond the most possible and effective ways of fixing the HTML5 errors.

How to Fix HTML5 Video Not Found on Your Browsers (1)

  • Part 1. Reasons and Solutions for HTML5 Video Not Found
  • Part 2. Repair Saved HTML5 Video Not Playing
  • Part 3. FAQs about HTML5 Video Not Playing

Part 1. Reasons and Solutions for HTML5 Video Not Found

Most of the time, a video can be corrupted by gaining errors from various sources. But there can be many reasons for HTML5, as it is opened using a web browser. With this idea in mind, you have to think about the causes before solving the problems. This part will show the possible causes and, at the same time, the effective methods of repairing HTML5 not working.

  • A website issue is one to consider. The embedded videos on the page have backend issues that are not fixed by the developers.
  • The browser issues include unsupported codecs, incompatible files with the browser, and overloaded cache and cookies.
  • Customized settings restrict the browser from doing a playback with HTML5 videos.

With these problems, you can still fix them by following the solutions below:

Update the Browser

It has been said that an updated browser version often solves the issues. Google Chrome, Firefox, Opera, Safari, and Internet Explorer can only play videos with the latest version. If HTML5 is not playing, better check the steps below to update the browser:

Step 1.

From the browser, click the Ellipsis icon from the top right corner. It is also known as Customize and Control Google Chrome. Select the Help option.

Step 2.

Choose the About Google Chrome option from the submenu. The settings will check for the latest updates. If the Update button is available, click on it to install the software. Do the same thing to the other browsers.

How to Fix HTML5 Video Not Found on Your Browsers (2)

Clear the Browser’s Cookies and Cache

Caches and cookies are helpful tools for faster and more efficient online surfing. But over time, without deleting them on your browser, these temporary files will disrupt your online activities, such as HTML5 video not working on your Mac. Follow the instructions on how to delete cookies and cache files:

Step 1.

Access the settings on your browser. From the left pane, find the Advanced section. Click on it.

Step 2.

Choose the Privacy and Security option. When you open the Clear Browsing Data window, choose the files you want to delete. Then, click the Clear Data button to confirm the deletion.

How to Fix HTML5 Video Not Found on Your Browsers (3)

Deactivate the Hardware Acceleration

As not all functions are helpful, the Hardware Acceleration can make HTML5 videos not found on your browser. Initially, this function is best for high-resolution graphics for videos and games, but it creates lags for the browser. But don’t worry; turning it off only means the GPU is allowed to load the HTML5 video. You can toggle off the Hardware Acceleration with these steps.

Step 1.

Open the Settings app on your browser via the Ellipsis icon from the upper right corner.

How to Fix HTML5 Video Not Found on Your Browsers (4)

Step 2.

Navigate to the Advanced section and open the System tab. Switch off the button for Use Hardware Acceleration When Available. Try to open the HTML5 video again.

Use HTML5-Supported Codecs

How to fix the video not found issue of HTML5 without changing your settings? You can use codecs that support the video format. However, you will need to contact the browser’s developers and request to install a supporting codec for OGG, WebM, and MP4. This can be an alternative solution, but it is easy to install codecs on the browser, and you might take longer to get an answer from the developers.

Connect to a Stable Internet Network

Your WiFi network will always be an important factor when you want to play HTML5 videos. It is recommended to check the signal stability with a strong signal in your surroundings. Furthermore, do not use mobile data if you barely see any progress on the video. To check the WiFi network, here’s what you need to do:

Step 1.

Go to the Settings app on your device and search for the Network & Settings menu.

How to Fix HTML5 Video Not Found on Your Browsers (5)

Step 2.

Once the window is opened, click the Status button under the Network Status section. Check if the solid bars are high on numbers. This means the signal has good strength.

Part 2. Repair Saved HTML5 Video Not Playing

What if the video is unplayable from the start? Because of corrupted details, the playback is interrupted on your device. Aiseesoft Video Repair is the recommended solution to remove the errors in your video. The cross-platform software intends to repair the video quality, resolution, frame rate, and other elements to revive the video playback. While it has intelligent technology that can imitate a perfect sample video, the interface is made to be beginner-friendly for an easier learning curve. On top of these, Video Repair has the highest rate of successfully fixing corrupted HTML5 files on Windows or Mac.

How to Fix HTML5 Video Not Found on Your Browsers (6)

Downloads

Aiseesoft Video Repair

  • Recover HTML5 not playing on the computer.
  • Fast-speed process without data loss.
  • Secure private information while recovering the video.
  • No additional plugin to repair corrupted HTML5.

Free DownloadFor Windows

How to Fix HTML5 Video Not Found on Your Browsers (7)100% Secure. No Ads.

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Step 1.

Download Aiseesoft Video Repair by clicking the Free Download button. Follow the onscreen instructions to install the software completely. Then, wait until the program is running on your computer. Click the + button to upload the corrupted file. Proceed by clicking the Open button.

How to Fix HTML5 Video Not Found on Your Browsers (9)

Step 2.

Click the + button on the right. It is recommended that the sample video should consist of the same details as the corrupted video, including the encoder, duration, and resolution. It will get a higher chance of better results.

How to Fix HTML5 Video Not Found on Your Browsers (10)

Step 3.

After the preparation, initiate the process by pressing the Repair button. Wait for the program to process and recover the video. After a while, the corrupted video is fixed. Check for mismatches from the corrupted and sample video.

How to Fix HTML5 Video Not Found on Your Browsers (11)

Step 4.

Preview the result by using the Preview option. If you like the result, you can export the file by clicking the Save button. Once done, you can do another video repair by clicking the Upload Other Videos button.

How to Fix HTML5 Video Not Found on Your Browsers (12)

Part 3. FAQs about HTML5 Video Not Playing

Is HTML5 still a thing?

Yes. It is widely used for web designing and applications. It is still supported by modern browsers, and using it is not impossible. However, it will require more help from technologies like CSS, Javascript, and so on.

How do I fix the HTML5 video 4 error?

When you see the ‘Error code: html5_video:4 message,’ you may need to check the supported codec on your browser. It is also best to keep the browser updated, as the older version does not support HTML5. Additionally, use the solutions from this article to quickly fix the problem.

Does Firefox support HTML5?

Yes. But keep in mind Mozilla Firefox Version 2 to 20 partially supports HTML5. This means there is no assurance that the video will play on the browser. But if it’s updated to Version 49 and above, playing a video will not be impossible.

Is it possible to convert HTML5 to other video formats?

There are tools available to convert HTML to a different format. One of these converters is FFmpeg, which you can install as a server on your browser. Another one is Hangfire.io, which creates a background task that uses MEdiaToolkit. Then, it will easily convert HTML5 to MP4, WebM, and OGG.

Is there a way to play HTML5 video on my computer?

There are video player alternatives that support the video format. Try VPlayed, Kaltura, Brid.TV, Flow Player, VideoJS, Muvi, Dacast, JW Player, THEOPlayer, and more. Take note that most of these alternatives are not for free and require a complex setup.

Conclusion

To summarize this article, you have learned what ‘HTML5 video not found’ means on your browser. You also discovered the best solutions to fix the issues from the browser, unsupported codec, and unstable internet connection. If the HTML5 video turns out to be corrupted, it is not a problem with Aiseesoft Video Repair because of its powerful system. You can try it for free and see how it can turn a corrupted file into a brand-new and high-quality video.

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How to Fix HTML5 Video Not Found on Your Browsers (2024)

FAQs

How to Fix HTML5 Video Not Found on Your Browsers? ›

If you encounter an "Error code: html5_video:4" on your embedded player, it is most likely related to your pre-roll video. Below are some ways to fix this. Check that the pre-roll video that you have been using is still in the dashboard. To do this, go to media uploads and click on the pre-event video section.

How to solve HTML5 video not found? ›

We suggest you follow the order given here while troubleshooting ? from simpler to complex solutions.
  1. 5 Ways to solve 'HTML5 Video File Not Found' error.
  2. Method 1 - Update your browser.
  3. Method 2 - Remove cookies and cache.
  4. Method 3 - Toggle hardware acceleration.
  5. Method 4 - Start the browser in Safe Mode.
Jun 12, 2024

How do I fix an HTML5 video not found on my iPhone? ›

  1. HTML5 video file not found: How to solve the issue.
  2. Find the video of other formats. Update your older version Browser. Switch off the Hardware Acceleration. Delete the Caches and Cookies. Operate the Browser in Safe Mode. Install the Supporting Codecs of HTML5.

How to fix Error code in html5_video 4? ›

If you encounter an "Error code: html5_video:4" on your embedded player, it is most likely related to your pre-roll video. Below are some ways to fix this. Check that the pre-roll video that you have been using is still in the dashboard. To do this, go to media uploads and click on the pre-event video section.

How do I support HTML5 in Chrome? ›

You enable HTML5 by declaring the doctype at the top of your HTML document, in the very first line: <! DOCTYPE html>

How do I fix my browser does not support HTML5 video? ›

So, follow the beneath techniques to solve the HTML5 video file issue.
  1. Use Latest Browser Version. ...
  2. Erase Caches and Cookies. ...
  3. Turn-off Hardware Acceleration. ...
  4. Use Safe Mode to Start Browser. ...
  5. Open HTML5 Video in Incognito Mode. ...
  6. Download the Supporting Codecs of HTML5.

Which browser supports HTML5? ›

HTML5 is supported by all the major browsers, including Chrome, Firefox, Safari, Opera, as well as iOS for Chrome and Safari and Android browsers. It can even work with the older and less popular browsers like Internet Explorer.

Does iPhone support HTML5? ›

The iPhone browser is also in the forefront of HTML5, so dig into the spec. For more in-depth detail, check out the Safari Developer's corner: Safari HTML Reference. Safari CSS Reference.

Does Safari support HTML5 video? ›

HTML5 Videos do not work in Safari on Mac or iOS, but work fine in other browsers.

How to insert HTML5 video? ›

To embed a video in an HTML document, use the <video> tag inside the body of the document.

Could not play video error code html5_video 4 iphone? ›

When you see the 'Error code: html5_video:4 message,' you may need to check the supported codec on your browser. It is also best to keep the browser updated, as the older version does not support HTML5.

What is the most recent HTML version? ›

HTML 5 is just the latest version of the HTML standard. There was HTML 4 before that (and XHTML), HTML 3.2, HTML 2.0, etc.

What is unable to play video error 5? ›

Usually, Google Slides cannot play video and throw error 5 when the video file is corrupt or inaccessible. Error 5 can also occur due to no or slow Internet connection. A technical glitch or malicious extension in the browser where you are trying to open Google Slides can also result in video error 5.

How do I get HTML5 to work? ›

There is nothing to install HTML5 it's not an installation program …...just make the program and make sure the browser through which you are running is HTML5 compatible. you need not install anything on your PC. Just code in a text editor, save it as a . html file, and open (run) the file by your browser.

How to open HTML5 in Chrome? ›

Some steps you can follow when opening the files are:
  1. Right-click on the HTML file you wish to see and select "Open with" from the menu. ...
  2. Choose Chrome from the list, then view your file in the app.
  3. If you have Chrome as your default browser, you can just double-click the HTML file and it opens in Chrome.
Jun 28, 2024

How do I enable HTML in Chrome? ›

Select the three-dot menu in the upper-right corner of the browser window. From the menu, hover over More tools and then choose Developer tools in the menu that appears. A window will open that shows the HTML source code on the left of the pane and the related CSS on the right.

How to convert video to HTML5? ›

All it takes is 3 easy steps to convert any of your video to HTML5:
  1. Drag-n-drop video file to Easy HTML5 Video;
  2. Set poster image, select codecs, tune settings;
  3. Press "Start".

How do I disable HTML5 video player in Chrome? ›

“Disable HTML5 Autoplay (Reloaded)” disables HTML5 audio and video autoplaying. Now any video is blocked until you click the agreement button. In addition to removing the HTML autoplay attribute from media elements, “Disable HTML5 Autoplay (Reloaded)” also hooks into the media's JavaScript API.

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