If suddenly the videos on Youtube began to display incorrectly: slow down, freeze, distorted by artifacts - check which player is playing this video. If it turns out that this is HTML5, then in this article we will tell you how to disable it and return the usual Flash Player for browser Mozilla Firefox.
The reason lies in the fact that recently the YouTube development team began to transfer the default video display program from the obsolete Flash Player to the new HTML5 video player. In addition to its advantages, it still has a number of disadvantages: it is more “heavy” (on aging computers the image will be “glitchy”), has problems with full-screen mode (buttons disappear), compatibility problems with some video card drivers, codecs, etc.
Checking the player version is very simple - just click right click mouse on the video and read information about the player in the drop-down menu:
In order to turn it off and return it back Adobe Flash Player:
1. Type in the address bar of your browser about:config
2. Promise that you will be careful:
3. Here you will see different browser settings values. To make it easier for you to find what you need, type the word in the “Search:” field media. Find and change the values of named fields media.ogg.enabled, media.wave.enabled, media.webm.enabled, media.windows-media-foundation.enabled from "true" to "false" for each of them. To do this, double-click on each line found:
After changing these settings, Firefox will no longer play online videos in the new HTML5 player, and, accordingly, will open it using the Adobe Flash plugin, as it did before.
4. Restart your browser, or clear its cache and try opening any video again. Check the player version with the right mouse button:
If you want to return HTML5 video player support to your browser, simply change the changed values back to “true”.
PS. If possible, try updating your video card drivers first. Perhaps after this the image quality will stabilize and you will not need to change your online video player.
HTML is a web page markup language, essentially it is responsible for the correct display of all elements on the page. New language specifications are gradually being released, the latest being the fifth version, which brought the abolition of old ones and the introduction of new tags and functions. C HTML5 Yandex browser began to support video playback through its own Video Player, which does not require the installation of other plugins, such as Adobe Flash Player. The built-in functionality of the language allows you to play any movie on a website that supports HTML5.
In the absence of HTML5 for the Yandex browser, I had to use Flash Player to play video and some music. This resulted in a situation in which standard means browser it was impossible to listen to music. The greatest influx of users to Flash was provoked by the emergence of the largest video hosting site, YouTube. Over time, other large companies, such as Apple, began to use it for video processing.
User growth continued for a long time, immediately after the release of HTML 4.01 there was a big jump in popularity. The outflow occurred only after the release of the new HTML5 specification, which first appeared in 2012, but a full launch occurred in 2014.
The video player is prompted to switch to HTML5 by several main disadvantages of the Adobe plugin:
- The need to additionally install into the system. Over time it was added to Google Chrome default;
- Low speed and frequent loading interruptions;
- Poor stability, often crashes and conflicts appeared, often had to reload the page.
Advantages of HTML5 over Adobe Flash Player
Technologies are inherently different, but are intended for the same tasks. For users and developers, the new HTML5 standard has brought a lot of advantages:
- Open source. The programmer can independently modify the code. Useful for improving the security of business resources and applications;
- Fast development. The development is carried out by the advanced company W3C, which draws good ideas from users finalizing the standard;
- Compatible with most platforms. Flash Player is not supported on Android versions up to 2.01 and 4.1x and later, and the plugin is not compatible with iPhone and iPod. To use the new player, you need to have a relatively new version of Yandex browser;
- Energy efficient technology. The HTML5 video player consumes significantly less processor resources and, accordingly, saves battery power, which is important for any mobile phone.
What is HTML5 Video Player for the Yandex browser?
HTML5 Video Player is a program designed to convert video files into HTML format 5. Additionally, you can watch videos through the application, but such a need does not arise with the modern capabilities of the Yandex browser. You can load any file of common video formats into the program: mp4, AVI, MKV.
After processing the file, it will be suitable for uploading to the server; the publishing function is already built into the program. Before uploading to the server, the video can be viewed in a browser. It is better to download the program from the official website. 
Some users complain that the application does not work, closing immediately after loading a file into it. Reinstalling or disabling the antivirus helps resolve the problem. In order not to search for the causes of the malfunction, it is better to use a similar program - Free HTML5 Video Player.
The process of using both applications is similar:
To insert a video on the site, just copy JavaScript code from the page in the browser that opened after conversion, and paste it into the video block on the web resource. 
How to watch HTML5 Video in Yandex browser
In fact, you don’t need any special techniques to watch videos on the Internet in HTML5 format. To start watching, just go to the video and the browser will do everything on its own. Playing videos on YouTube and many other services is not difficult; today this video hosting works exclusively with the HTML5 format; only for outdated browsers does it automatically switch to the old Flash Player.
Sometimes you can't view HTML5 videos if there are errors. The technology refers to a relatively stable way of viewing visual content and sound, but periodically provokes errors:
Sometimes updating the Yandex browser helps:
For the average user, viewing a video in HTML is not difficult, but it is important that the service supports the format. Famous social network Facebook does not work with HTML5, but there is a way to open this feature through the HTML5 Video Player extension, which can be downloaded from this link.
HTML 5 is a public format that is supported by everyone modern browsers, it does not need to be installed separately. Using the HTML5 Video Player program for Yandex browser, you can watch, download videos and convert various formats in HTML5, making them available for online viewing.
Adobe Flash Player is in its last years. This platform is obsolete, and developers will stop supporting it by 2020. Many companies, programmers and enthusiasts have already begun to abandon the proven format in favor of progressive, but still “raw” technologies. One of these innovations is the “HTML5” video player, which could potentially replace the good old Flash Player.
Not all users can boast of powerful and modern personal computers with all the updates operating system(drivers, codecs). Not everyone has it installed (the higher the version, the fewer errors during operation). But everyone is interested in the life boiling in global network Internet. Thousands of films and TV series, tens of thousands of clips, hundreds of thousands of funny amateur videos can be found and watched through the World Wide Web anywhere on planet Earth.
If graphic distortions occur when watching a video on a computer, the user should not be upset and look for an alternative to watch. The first thing you need to do is check the functionality of your PC, whether all updates, drivers and codecs are available and in working order. The second nuance is checking the video player built into the Mozilla Internet browser itself. Developers from Mozilla Corporation try to please all their fans and regular users search engine. Therefore, everyone has the opportunity to view video images through various players: Flash Player or HTML5. To check which player is enabled in the Firefox browser, just right-click on the screen with the video.
How to disable HTML5 in Firefox
If custom Personal Computer inferior in technical specifications to your modern brothers, you can try changing the player from HTML5 to Adobe Flash Player. To do this you need to go to hidden settings browser by typing “ about:config" The developers kindly warn about the risks associated with changes in “fine” settings. We take responsibility.
In the “Search:” window, for ease of finding to change parameters, you need to type the English word “media”.
Four parameters that can be enabled by default must be changed from “true” to “false”. That is, turn them off double click left mouse button.
- media.ogg.enabled
- media.wave.enabled
- media.webm.enabled
- media.windows-media-foundation.enabled
After restarting the Mozilla browser Firefox settings will come into force and new player HTML5 will be replaced by Adobe Flash Player.
How to enable HTML5 in Firefox
If it is necessary to carry out the reverse manipulation and change the old Adobe player to a progressive analogue, the user needs to carry out the same manipulations with the above parameters from “false” to “true”. By restarting the Internet browser, the video should show without interference or glitches.
The most popular browser, Mozilla Firefox, has good support for HTML5 standards, but it is still impossible not to notice that it does not cope with some tasks associated with this technology in the best way.
How to enable html 5 in firefox
So, despite HTML5 support, some YouTube videos in Firefox stubbornly refuse to play. Fortunately, there is an easy way to quickly solve this problem.
Mozilla Firefox has advanced support for HTML5 technology, but it is disabled by default. To enable this setting, first type about:config in your browser and navigate.
This will take you to a page with browser configuration settings. To go directly to the list of parameters, click the “I promise I’ll be careful” button. In the list that opens, find the parameter
media.mediasource.enabled
The easiest way to do this is by inserting its name into the search field located just below address bar. By default, the value of this parameter is set to false, that is, disabled.
Replace it with true by double-clicking on the parameter name with the mouse. That's all. Now close the configuration settings tab and restart the browser. You can check that HTML5 videos on YouTube should now play without any problems.
And finally, I would like to draw your attention to one detail. For this setting to work, you need to have the appropriate software installed on your computer. Adobe plugin Flash Player, otherwise the opposite may happen and some videos will stop playing.
Problems playing HTML 5 videos in Firefox
Also for Windows 7, installing the following updates may help:
http://support.microsoft.com/kb/968211
http://www.microsoft.com/en-us/download/details.aspx?id=16546
And also set these parameters to default in about:config.
media.windows-media-foundation.enabled
media.directshow.enabled
IN Firefox Quantum I'm seeing the same problem.
Many users, when trying to play a video on Youtube, receive the following message - “Currently your browser does not recognize any of the video formats.” Most often, owners of Windows XP with Mozilla browser FireFox. The problem is also observed in other popular browsers: Google Chrome, Yandex, Opera and, of course, Internet Explorer. Today we will tell you everything possible reasons failures and their elimination.
Reasons why playback fails
The bug itself appeared relatively recently. It is associated with the active transition of the YouTube service to support HTML5 technology, which is not supported in browsers with outdated versions. The error also appears in updated versions on Windows 7 and 10. Here it’s worth talking about extensions that block access to displaying videos in HTML5 format. The third reason is that the new video did not have time to load. Let's look at all the solutions to fix the crash.
Fixing the error
Let's check all the above points one by one. I’ll note right away that I won’t describe all the half-measures (reboot, new Flash Player, erasing cache/cookies), because they won’t be of any use. You will need to check the following.
#1 Checking for updates
First of all, you need to update your browser to the latest version. The update principle is the same in all applications. But still, here brief instructions:
Current versions These programs include most of the necessary video codecs for YouTube. You can check which ones are supported at this address - youtube.com/html5. Perhaps some codecs will be with exclamation mark, but be sure to check that there is a checkmark next to the first codec HTMLVideoElement. The problem should go away.
#2 Blocking add-ons
If the previous point did not help you, try disabling unnecessary extensions. The fact is that various plugins and extensions can block the display of videos in HTML 5 format. For example, these plugins most often cause the problem - “Flash Player for YouTube™” And “Disable Youtube™ HTML5 Player”. Extensions for direct download, ad blockers, etc.
- Open the list page installed extensions. For example, in Chrome it is located here chrome://extensions/, and in Mozilla here - about:addons.
- Disable all active plugins one by one and check playback. It should help.
I will separately mention Flash Player, which conflicts with new versions of Chrome. You should try turning it off too. If you still have old version, then go here - chrome://plugins, In the list of plugins, select flash and disable it. IN new version go here - chrome://settings/content/flash. In point "Block" there is an option "Add", I recommend adding YouTube there. For other browsers on the Internet there is a lot of information on disabling Flash Player - try it.
#3 New video
Check the release time of the video. If it takes several hours, then the problem may be on the server side. Many users note that after waiting a little time, they start the video without problems. Perhaps this is your case.
Conclusion
If you did everything correctly, the error “Your browser does not currently recognize any video formats” should disappear. Finally, it's worth mentioning that Mozilla and Chrome recently stopped supporting their application on Windows XP. In this case, to solve the error, you will need to separately install codec support plugins. Here is a visual video instruction using Mozila as an example.
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