Please update your browser to ver 52 ESR that would help I am sure. https://www.mozilla.org/en-US/firefox/organizations/

Update your Flash : https://get.adobe.com/flashplayer/otherversions/

Not enough info came with your question. Plug-ins/Extensions/Flash/Video Info

Please update your Video Software... both Nvidia and AMD released new software this week. https://support.mozilla.org/en-US/kb/upgrade-graphics-drivers-use-hardware-acceleration

https://support.mozilla.org/en-US/kb/fix-common-audio-and-video-issues

https://support.mozilla.org/en-US/kb/fix-video-audio-problems-firefox-windows

https://support.mozilla.org/en-US/kb/html5-audio-and-video-firefox

Try these things out.

Please let us know if this solved your issue or if need further assistance.

You can always download the clip and play it later.

on another pc videos work also on firefox 43 so is not my old firefox the problem and i already tried new versions with no luck and only later i downgrade , my flash is already update btw the videos not work with flash is another format but don't know why in another pc work here not...i prefer watch videos in streaming other than download them...hope there is other solutions...i'm waiting..thanks in advance

here my plugins : http://i.imgur.com/q2dKPfj.jpg the only extension i have is the kaspersky protection from my antivirus

anyone found a solution ?

please need help...

What does the YouTube test page show?

• https://www.youtube.com/html5

here the screenshot of the page http://i.imgur.com/ihfGgca.jpg

You do not have support to play H.264 MP4 files and also can't play WebM with VP9, but the latter is likely because for your Firefox 43 version. You should normally have support in your Vista operating system to play MP4 files.

You can check these support articles:

• https://support.mozilla.org/en-US/kb/fix-video-audio-problems-firefox-windows
• https://support.mozilla.org/en-US/kb/fix-common-audio-and-video-issues
• https://support.mozilla.org/en-US/kb/html5-audio-and-video-firefox

i already tried newer version of firefix and still no video H.264 MP4 will load and on another pc with firefox 43 i can watch the videos...can you please tell me how to fix this problem ? thank you for the answers

cor-el said

You do not have support to play H.264 MP4 files and also can't play WebM with VP9, but the latter is likely because for your Firefox 43 version. You should normally have support in your Vista operating system to play MP4 files. You can check these support articles:

• https://support.mozilla.org/en-US/kb/fix-video-audio-problems-firefox-windows
• https://support.mozilla.org/en-US/kb/fix-common-audio-and-video-issues
• https://support.mozilla.org/en-US/kb/html5-audio-and-video-firefox

sorry for the double post but these links sadly not help hope someone know how resolve this problem soon...and btw the other pc where i can see video on firefox 43 is a windows vista too so don't know with videos not work only here...

Maybe check this:

• https://support.microsoft.com/en-us/kb/2117917

i have the service pack 1 only and this seems can't be installed on it do yo know if there is a way for install it on sp 1 or another solution becaise i prefer no upgrade the service pack maybe a plugin that enable all videos format ( and on every site ) on firefox can be helpfull if exist..thank you

Lanselot said

i prefer no upgrade the service pack

Why not? What do you have against that upgrade?

SP2 for Vista was released about 8 years ago, so it's not like some new, untested software.

https://support.microsoft.com/en-us/help/935791/how-to-obtain-the-latest-windows-vista-service-pack

Lanselot said

maybe a plugin that enable all videos format ( and on every site ) on firefox can be helpfull if exist..thank you

No, websites decide how to serve their content, and the trend is definitely toward built-in players rather than plugins. If you want to to grab the content and use the player of your choice, you should look at extensions and downloaders.

jscher2000 said

Lanselot said

i prefer no upgrade the service pack

Why not? What do you have against that upgrade?

SP2 for Vista was released about 8 years ago, so it's not like some new, untested software.

https://support.microsoft.com/en-us/help/935791/how-to-obtain-the-latest-windows-vista-service-pack

Lanselot said

maybe a plugin that enable all videos format ( and on every site ) on firefox can be helpfull if exist..thank you

No, websites decide how to serve their content, and the trend is definitely toward built-in players rather than plugins. If you want to to grab the content and use the player of your choice, you should look at extensions and downloaders.

when i upgraded to service pack 1 my compurer become very slow and the upgrade i downloaded from the microsoft site added many process in background that i difficulty tried to block and since i use the computer also for other things don't wanna risk more slow down because of another service pack... because of this i hope there is another solution for solve the problem you talked about extension so you know if some extension can fix this and if yes where to download them ? if there are also other solutions please let me know since flash will be disabled soon i need a way for watch the videos before his "death" thank you

Maybe ask at a Windows oriented forum if there is a solution for these service pack related issues.

btw if there will be new solutions like new plugins / extensions that work like flash let me know...other forums not help sadly ... do you know also if after 2020 the flash player already installed will work on firefox ? if yes at least i can continue to use it on streaming site that still work with flash...thanks

Lanselot said

here my plugins : http://i.imgur.com/q2dKPfj.jpg the only extension i have is the kaspersky protection from my antivirus

Why is the internal OpenH264 codec set to Never Activate? Try enabling it by setting it to Always Activate. It cannot be set to Ask to Activate, but it’s safe and most likely required. While at it, do the same for the Content Decryption module. You could even uninstall Flash at this point, even if it was just for testing, and only reinstall it for websites that require it. Speaking of, you also disabled Flash, so how do you expect H264 playback to work?

Firefox does not prevent H264 playback for me when disabling both add-ons, so you might need to add the Platform Update Supplement for Windows Vista as suggested above in the Fix video and audio problems on Firefox for Windows N editions article. The other system may already have that installed, so you could check for it being present.

Also, I would really try to get a Windows 7 update for your OS. Vista is old, slow, insecure and prone to new issues. You may be one of the few still using it. ;) There is no point running it as long as possible, since you can expect more websites to break. And that’s regardless of Flash - most people uninstall it anyway simply because it is no longer needed. And of course, Firefox 43 is not as safe as current versions. The same goes for uninstalled Service Packs - if there is an issue installing it, chances are you have more issues in the OS, and you will experience more of them.

turning on the plugins h.264 and the primetime contenct not resolve the problem i already tried seems is not a plugin for the videos and in another pc also with all of them off videos will play ( i active flash only when i need it and for the sites with no longer supported flash videos not work for example live videos on youtube no longer work alo with flash activated ), the upgrade is only for the service pack 2 and like i said some post before i prefer not upgrade services packs...i really hope there is another way for solve this...let me know if someone find it...thank you

any news about other extensions or plugin that can "decode" all video format like flash ?