Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

How to play HTML5 videos? Please help

  • 10 replies
  • 2 have this problem
  • 1 view
  • Last reply by Jon Gregory

more options

So I've used Firefox since ever it came out and now I have problems with playing videos on YouTube because of the HTML5, I currently have Firefox 35.0.1 and I even had 36 but the problem was still there, the only way I found to solve this was to downgrade to 31 since it still uses flash, please help me here, the videos won't play on Firefox but they will play in Internet Explorer.

All Replies (10)

more options

Try this add on . It will force youtube to use flash.

Have a great day!!

Jon

more options

May be difficult to sort out if you are on the unsupported Firefox 31 I suggest you upgrade *

If you do need to use Firefox 32 a safer method that works in some cases and in this sort of situation is to use the current up to date secure and supported version (Fx 35.0.1 at the moment), but spoof Fx31 by using an add-on to switch the User Agent String. There is even an add-on but for the opposite problem

Firefox 35 works for me playing Youtube HTML5 videos. I attach screenshots of

Click thumbnails for larger image

YouTube has been making changes and may make further changes relating to different Firefox versions and the Flash/HTML options on YouTube. If anything the more likely problem is being offered only HTML and not FlashPlayer.

Another complication, but again the other way round is that due to a series of security patches having been issued recently for FlashPlayer, so users may have old versions of FlashPlayer that Firefox blocks.


*

More complicated but it is possible to install multiple versions of Firefox, but you should also use separate profiles for each version. It is something you may consider trying if you need to keep a working Firefox 31 for playing You Tube until you sort out Fx35.

more options

John99 said

May be difficult to sort out if you are on the unsupported Firefox 31 I suggest you upgrade * If you do need to use Firefox 32 a safer method that works in some cases and in this sort of situation is to use the current up to date secure and supported version (Fx 35.0.1 at the moment), but spoof Fx31 by using an add-on to switch the User Agent String. There is even an add-on but for the opposite problem Firefox 35 works for me playing Youtube HTML5 videos. I attach screenshots of Click thumbnails for larger image YouTube has been making changes and may make further changes relating to different Firefox versions and the Flash/HTML options on YouTube. If anything the more likely problem is being offered only HTML and not FlashPlayer. Another complication, but again the other way round is that due to a series of security patches having been issued recently for FlashPlayer, so users may have old versions of FlashPlayer that Firefox blocks.

*

More complicated but it is possible to install multiple versions of Firefox, but you should also use separate profiles for each version. It is something you may consider trying if you need to keep a working Firefox 31 for playing You Tube until you sort out Fx35.

This is what I get

more options

You can click "Use the default player" to get the Shockwave Flash player.

See also YouTube Flash Video Player:

more options

Not yet sure of the answer, but you would be best trying from the supported and up to date Fx35.

Replies from others in this thread are explaining how to use FlashPlayer. Please confirm you are wishing to use HTML5 and having problems doing that from Fx35. You are not wishing to use FlashPlayer.

I presume your screenshot is from Fx31, and shows HTML5 set as the default for Youtube

more options

John99 said

May be difficult to sort out if you are on the unsupported Firefox 31 I suggest you upgrade *

Firefox 31.0 is supported if using the 31.4.0 ESR

more options

John99 said

Not yet sure of the answer, but you would be best trying from the supported and up to date Fx35. Replies from others in this thread are explaining how to use FlashPlayer. Please confirm you are wishing to use HTML5 and having problems doing that from Fx35. You are not wishing to use FlashPlayer. I presume your screenshot is from Fx31, and shows HTML5 set as the default for Youtube

Actually it is from Firefox 35...

more options

Hi Ken,

My best guess is that this is something specific to your own install. Have you found and tried any other HTML5 videos. Is it only the YouTube site, if so clearing the cache & the cookies for the YouTube site may help.

Otherwise some standard advice try in Firefox's safemode and with all your plugins disabled. One of the video related plugins may possibly be causing this.

more options

Jon Gregory said

Try this add on . It will force youtube to use flash. Have a great day!! Jon

I so grateful I finally found your answer. It worked. I wrote my own question (Some videos will not play correctly.) and only got one answer that wasn't the solution. I was about to write again when your answer popped up. I'm so grateful and especially that it was such a simple solution, I just wish it had come before I put in so many hours trying to explain it all.

Thanks, Bernadine

more options

I'm glad I was able to help you!!

Have a great day!!

Jon