Being here and reading this right now means you must have tried playing a video on the internet and instead received a message saying “Error HTML5 video file not found”. Not being able to play a particular video on the internet due to the HTLML5 video error can be annoying, especially when the video in question is of great importance. It could be a tutorial video, a valuable piece of news, or just for laughs. Fortunately, the "HTML5 video file not found" error can be fixed. And in this article, you will find the 7 best methods for fixing this error, alongside its meaning and causes. You will also find some guidelines to adhere to when dealing with such video elements for a smooth experience.

error html5 video file not found
  1. Part 1: HTML5 Video File Not Found Overview
  2. Part 2: How to Fix HEML5 Video File Not Found?
  3. Bonus Tip: How to Repair Corrupted HTML5 Video Files?HOT
  4. Part 3. Guidelines for HTML5 Video Files
  5. FAQs:

Part 1: HTML5 Video File Not Found Overview

In this section, we will go through what HTML video files are and what the ‘HTML5 video file not found’ error means. This overview will also include the reasons behind getting this error message. 

What is HTML5 Video File?

Every web browser requires an advanced video element to be able to play videos on them, and that is what HTML5 is – an advanced video element needed to play videos online. In the past, Adobe flash plugins were used for such purposes, but because they became unreliable and difficult to work with, the HTLM5 videos became the best option. This video element became the favorite of many web developers because it is compatible with other web browsers, and has sought-after video attributes such as video playback, autoplay, pause, stop, and volume control, among others. What does it mean when you get the ‘HTML5 not found’ error? Two things are usually involved with this error message; either your browser does not support the codecs format of the HTML5 video you are trying to access or some of the video codecs are missing. It could also mean that the website you are on is experiencing some backend issues, making it impossible for the browser to redirect the path of the video.

What’s the Cause of HTML5 Video File Not Found?

Knowing the causes of the "HTML5 video file not found" error is essential as it will be the first step towards fixing it. The causes of this error can be seen below.

Backend Issues: As earlier mentioned, backend issues with the website can lead to the "HTML5 video file not found" error. It is an issue that has to do with the website’s code. When there’s a code glitch, the video becomes impossible to access. However, this problem can be resolved from the web developer’s end.

Browser compatibility Issues: You know it is a browser compatibility issue when the video plays on a separate browser but displays the "HTML5 video file not found" error on the first one. Also, if the current version of the browser you are using does not support the HTML5 video codec being used on the website you are trying to access the video from, you are likely to encounter such an error. Updating your browser to the latest version may fix this problem.

Cookies & Caches: Cookies and caches are known culprits for web-loading problems. They tend to prevent videos from playing on web pages especially when there is the presence of some malicious bugs. Switch to incognito mode and see if the video plays.

Old Video Compatibility Issues: Chances are, some older videos on the internet still make use of flash players, and trying to play them with a browser that only supports HTML5 video files may result in the “HTML5 video not found” error because these videos do not have the HTML5 element.

Part 2: How to Fix HTML5 Video File Not Found

Fortunately, an error like "HTML5 video file not found" can be fixed. In this section, we will highlight and elaborate on the different methods by which this issue can be resolved with.

Fix 1: Update your Browser to the Latest Version to Fix HTML5 Video Not Found

Not all browser versions support the use of HTML5 video files. So, before moving on to other fixes check to see that your current browser version supports HTML5 videos. If it doesn’t, then you may want to update it. You will need to know the current version of your browser to be able to check if it is compatible with HTML5 videos. Follow the steps below to check the current version of your browser. Because Google Chrome is one of the most used browsers on the planet, we will be using it for this illustration.

Step 1: Launch your Chrome browser. Then navigate to the three-dotted icon located at the upper-right corner of your screen and click on it.

Step 2: Click on ‘Help’ and then select "About Google Chrome" from the pop-up menu.

click on about google chrome

Step 3: If you see the option ‘Update Google Chrome’ then it means your browser is of an older version. Click on it to update to the latest version. The absence of the option means your browser is up to date – if this is the case then you need to move on to the next fix.

Fix 2: Clean your Browser Cookies ad Caches to Fix HTML5 Not Found

For a browser to be user-friendly, cookies and caches are essential elements to the progression of this course. They are temporary storage mediums for a small chunk of data. If left unchecked, they tend to accumulate with time causing the browser to perform more slowly than usual. This can lead to difficulties when playing videos online. Clear your cookies and caches and then play the video after refreshing the page. Follow the steps below to clear cookies and caches on your Chrome browser.

Step 1: Launch Google Chrome, then navigate to and click on the three-dotted icon at the upper-right corner of your screen. From the dropdown menu click on ‘Settings’.

Step 2: Navigate to, and click on ‘Advance’ which can be seen on the left side of your screen. From the dropdown menu select "Privacy and security".

Step 3: From the pop-up window, select the ‘Advanced’ tab. Tick both boxes beside “cookies and other site data” and “cached images and files”, select a time range, and then proceed by clicking ‘Clear data’.

clear browsing data

Fix 3: Reinstall HTML5 Supporting Codecs to Fix HTML5 Not Found

As earlier mentioned, if your browser does not support the codecs format of the HTML5 video you are trying to access, the video won’t play. In such situations, you can contact the web developer to reinstall HTML5-supporting codecs.

Fix 4: Turn OFF Hardware Acceleration to Fix HTML Error Loading

Hardware acceleration in chrome aid with accelerating graphics-intensive media such as games, and videos. The hardware acceleration feature transfers the workload from your computer’s CPU to its GPU (Graphics processing unit). Turning off this feature can resolve some processing problems on chrome by placing the burden of loading a page on the CPU. This can potentially solve the "HTML5 video file not found" error. Execute this fix by following the steps below.

Step 1: Launch Google Chrome, then navigate to the three-dotted icon located at the upper-right corner of the screen. From the popup menu click on ‘Settings’.

Step 2: On the Settings window, click the ‘Advanced’ option and then click on ‘System’. On the next window, you will see the ‘Use hardware acceleration…’ option. Turn it off if it’s on.

use hardware acceleration when available

Fix 5: Start Browser in Safe Mode to Open HTML5 Video

Whenever there’s a browser issue, browsing in "Safe Mode" may be the only solution you need. But with the "HTML5 video file not found" error, it will require much more than that. You see, browsing in Safe mode will help you identify browser issues (Identifying the problem is always the first step to take in solving a problem) to enable you to fix them properly. If the video plays without any form of interruption when using Safe Mode, then it means both your plugins and extension are the culprits or your browser settings. Below are the features of Safe Mode.

  • They automatically turn off the hardware acceleration feature.
  • Safe Mode restores Chrome’s browser settings to default. 
  • All add-ons and plugins are disabled.

Fix 6: Download the HTML5 Video to Fix Video File Not Found

If at this point the "HTML5 video file not found" error isn’t fixed, downloading the video from the webpage to your computer may be the best option. Proceed by downloading a reliable HTML5 video downloader to save your desired videos from the internet.

Fix 7: Open HTML5 Video with Incognito Mode to Fix HTML5 Loading Error

Incognito Mode allows a user to browse the internet without the interference of cookies and catches. This fix becomes effective if your cookies and caches are the culprits. On your keyboard, press the Ctrl + Shift + N keys to open Google Chrome in Incognito Mode.

open google chrome in incognito mode

For Mozilla Firefox and Safari browsers, ‘New Private Window’ is referred to as Incognito Mode. If the "HTML5 video file not found" error is fixed after applying this method, the causes of the error message are likely add-ons or plug-ins. Fix this issue in normal mode by removing add-ons and plug-ins, or setting your Google Chrome settings to default.

Bonus Tip: How to Repair Corrupted HTML5 Video Files?

In some cases, a corrupted or damaged video file on a website can lead to the "HTML5 video file not found" error. In such situations where the video in question is of great importance, downloading and then repairing the video file may be the only option. To do so, you will need the assistance of third-party software. The recommended software for such scenarios is 4DDiG File Repair software. 4DDiG File Repair is a software that repairs any damaged or corrupted photos and videos on a computer or other devices, the likes of SD cards, USBs, and others. This software is quite effective and works for all scenarios. Below are the features of 4DDiG File Repair software.

  • It works for all video formats including MOV, MP4, M4V, MKV, and 3GP, amongst others.
  • It is compatible with Windows computers and other devices the likes of USB flash drives, HDDs, SD cards, etc.
  • It works even with camera brands like Canon, DJI, and GoPro.
  • The repair process is fast.

Below are the steps to take to repair a damaged video file using 4DDiG File Repair software.


For PC

Secure Download

  1. Launch the Tenorshare 4DDiG File Repair software on your computer after downloading and installing it. From the options presented on the home window of the software, proceed by selecting the ‘Video repair’ option.
  2. video repair
  3. On the next window, on the ‘Add’ button to import your corrupt or damaged video. Click on ‘Start Repair’ to proceed.
  4. add video to repair
  5. Once the repair process is completed, you can either preview the result or proceed to export and save your repaired video file. Always save your repaired files to a safe and secure location.
  6. repair video

Part 3. Guidelines for HTML5 Video Files

An important feature every website should have is the ability to play videos. This is because videos are used for several reasons such as advertisement, entertainment, and as communication mediums. HTML5 is the most preferred among web developers as the advanced video element required to put videos on the internet. This is because HTML5 is easy to use, reliable, and trusted by many. They facilitate the process of streaming videos on the internet. Below are some important guidelines to follow when it comes to uploading and viewing videos on the internet.

  • Always have a target audience in mind when uploading videos to a webpage.
  • Make your videos easily accessible by first making a prototype, and then modifications where necessary before uploading them to the public.
  • Pay attention to the size of the video to avoid compression issues.
  • Because some browsers are selective about the video formats they support, always check to see if your browser supports the video format you are attempting to play.
  • When creating a certain video, have it at the back of your mind that the space of the video file is determined by the quality of the video.
  • Certain video attributes such as width, height, and controls should be taken into consideration before uploading a video HTML5 video to the internet.
  • In situations where a reliable video hosting website is required, always opt for the paid version, because paid subscribers are prioritized when it comes to such services.

Following these guidelines will prevent the ‘HTML5 video files not found’ error from occurring.


Below are some of the most frequently asked questions when it comes to the "HTML5 video files not found" error.

How Do I Fix HTML5 Video File Not Found?

HTML5 video file-related errors can be fixed by updating your browser, clearing cookies and caches, toggling hardware acceleration, starting the browser in Safe Mode, and downloading compatible codecs.

What Does HTML5 Not Found Mean?

This means that there’s either a web backend issue or your browser does not support HTML5 videos.

How Do I Add Missing HTML5 Video Support to My Browser?

This can be done with the help of an extension on chrome.

Why My Video Tag is Not Working in HTML?

For such situations, three things are usually involved. Either your video file isn’t encoded for web deliveries, the videos are on a poorly configured server, or other scripts are interfering with the video playback.


There you have it, the seven best fixes for the "HTML5 video files not found" error. Being able to watch videos on the internet is of utmost importance, which is why developers make use of the HTLM5 video element. It is easy to work with, effective and has the basic attributes of a good video player. However, some web developers make mistakes when uploading HTML5 videos to web pages, and as a result, users begin to experience “HTML5 error loading videos” issues. In such situations, you can apply any of the above-listed fixes, they are effective and are guaranteed to fix the problems that come with HTML5: video file not found. Sometimes, videos on web pages do not play because they’ve been damaged or corrupted before being uploaded by the web developer. Downloading the video and then repairing it with third-party software becomes the best solution. 4DDiG File Repair is highly recommended for such tasks as it is fast, safe, and easy to use.

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4DDiG File Repair

4DDiG File Repair is your second to none choice to repair any damaged or corrupted photos. It repair corrupted or not playing videos on Windows and Mac.

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