YouTube, MetaCafe, DailyMotion, TuDou or Flash Video Not Playing or Stop After Few Seconds in Firefox (FF 2 and 3)
When viewing the Flash video streaming content in Firefox 2 (FF2) and Firefox 3 (FF3) on video hosting sites, such as YouTube, MetaCafe, DailyMotion, ToDuo, YouKo, Vimeo, 56.com, Veoh, Revver, imeed, iFilm, GoFish and many more, or on web pages that embed code from these video sharing sites, the streaming video is not playing, or stop playing after one or two or three seconds.
The Flash video not playing error, or stops playback after few seconds problem happens despite the media buffering is running fine on the video seek bar. If viewer move forward or backward the video, it will play for around 2 seconds again, and stop again. And when using Internet Explorer, the YouTube video and other Flash video is loading and playing fine without problem. The symptom looks to confine with Firefox browser, both version 2 and 3.
Adobe Flash Player seems to have many problems, other been no sound when playing back the Flash video on YouTube or similar sites. To fix the FLV video not playing or just plays for 2 or 3 seconds error, which may be caused by corrupted Adobe Shockwave Flash Player plugin, try the following resolutions.
Solution 1: Copy NPSWF32.dll to Mozilla Firefox Plugins Folder
The Flash video playback terminated after few seconds issue may be caused by DLL file for Flash Player is located at invalid location. Copy and paste the NPSWF32.dll from C:\Windows\System32\Macromed\Flash folder (32-bit Windows) or C:\Windows\SysWOW64\Macromed\Flash folder (64-bit Windows) into C:\Program Files\Mozilla Firefox\plugins folder (32-bit Windows) or C:\Program Files (x86)\Mozilla Firefox\plugins for (64-bit Windows). Then restart Firefox browser.
Solution 2: Uninstall Old Version and Install Latest Version of Flash Player
Download the corresponding version of Adobe Flash Player uninstaller, listed on Adobe Technote:
- Windows: uninstall_flash_player.exe (181 KB)
- Mac OS X: uninstall_flash_player_osx.dmg (1.3 MB)
- Mac OS 8.x, 9.x: uninstall_flash_player.hqx (33 KB)
Close all Mozilla Firefox web browser windows, and then run the Flash uninstaller downloaded from link above. After Flash Player uninstalled, download the latest version of Adobe Flash Player for Firefox, Mozilla, Netscape, Opera browser. Reinstall the Flash Player will likely to fix the YouTube Flash video not playing more than 3 seconds problem.
Solution 3: Install Adobe Flash Player 10
Exit from all Mozilla Firefox browser windows. Uninstall existing installed copy of Adobe Flash Player (most likely version 9 or earlier) using Uninstaller listed above. Download and install the Adobe Flash Player 10, which currently in beta phase, from Adobe Lab. The latest Flash Player 10 should fix all video playback on any sites error.
Solution 4: Start New Session of Firefox Browser
The FLV streaming video clip playback issue on YouTube, MetaCafe and other video sites may also happen due to too many tabs and/or windows of Firefox been opened. The exact cause is unknown, but potentially too many instances of Flash objects (not only your favorite movies or TV episodes use Flash for playback, some other elements or components on web pages, such as ads banner may be using Flash too) may mess up or corrupt the Flash plugin.
To fix this issue, close some or all the tabs opened, and then restart the Firefox browser. The video playback stops right after starting, not even before finishing problem should be resolved.
Related posts:
- Youtube, Dailymotion Google Video, Flash Games and Applications No Sound and Audio in Windows
- Video No Sound on YouTube, MySpace and Flash Video on Mac OS X
- Download Youtube, Grinvi, DailyMotion and Google Video FLV and Auto Convert to AVI or MPG with VDownloader
- Solution to Fix Youtube or Other Embedded Flash Video No Sound in External Websites
- Video Downloader Firefox Downloader Download Videos from Youtube, Google and 60+ Video Sharing Sites





I tried all of this and it ended up to be a Firefox add-on. FLASHBLOCK. Tested before and after and even when clicking on video in Metacafe (to enable video) still does not work. Removed FLASHBLOCK and is working. Had the exact same result on another pc.
Same problem on IE, firefox, and even google chrome. It's a Flash problem. Do a little research.
thank u so much, youtube started working
awesome. solution 1 worked for me. i installed and reinstalled flahs player before tired new and old version nothing workied. but copying tht dll file worked
thank you
@Doug
very strange. The Silverlight plugin has zero interaction with Flash. My guess is that the uninstall simply forced some sort of browser reset. If you reinstall SL, it will likely have no impact on Flash.
I uninstalled Microsoft's Silverlight and everything is back to normal!!!!
this happened to me. haven't tried restarting the browser yet, but other flash-related items aren't working either, like crunchyroll.com is doing the same thing. no idea how to update adobe to 10… but youtube works for me in google chrome.
thanks for the fix! Didn't know BBC iPlayer would be affected too but glad the problem is solved.
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Thank you. I had given up on watching videos with Firefox, opting instead to launch Internet Explorer when I stumbled across any video that looked interesting. Solution #1 worked great
Thank you
thanks for your solutions…
the first two did not work but the thrid was sucessfull
many many thanks!
fwiw, my solution came by plugging in and unplugging my headphones.
i saw what i thought was a little spark. it's actually a red flash (detecting presence of a jack?)
Disabling then re-enabling Flash player ver 9 worked for me, and it was the simplest solution of them all. Try it!
Solution 1 works fine with Firefox 3 and Flash 9.0.124.
Thanks a lot.
None of these work for me… mac os x 10.5.4, FF3.
Thank you, thank you. This has been wrecking my head.
thanks a lot for this. been having problems with this since i updated.
Thank you for posting this. I had been digging through bugzilla for 2 days before I found this post. It was driving me batty.
newgrl
I am having the same problem in osx on both Safari and FF3. I am confused why this is happening because I never had this problem before yesterday, and now it happens 100% of the time.
I tried solutions 2,3, and 4 and nothing works.
FYI VLC based media players like Miro can access youtube without a problem.
Solution 1 appears to have worked for me for YouTube in Firefox 3!
Many thanks for the tip.
Cheers,
JC
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Gacias solucione el problema del firefox3 con la solucion numero 1 copiando el DLL gracias
pizdec perevod.
na englishe by luchshe
Solution 1 worked great. Thanks so much!!
As an alternative to using the Flash 10 beta (which works fine for me), simply go to the addon panel, disable the Flash 9 plugin and then enable it again. I've tried it on my work machine using Flash 9, and it works great.
As listed in this Mozilla support thread:
http://support.mozilla.com/tiki-view_forum_thread…
Solution 3 worked for me (I had the same problem with both Firefox 2 and 3).
Many thanks!
Solution 3 worked for me with Opera.
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i have installed firefox 3 and damn this is headache my youtube and other videos works fine but 7 out of ten times when i open page having flash directly my firefox crashes and the task is gone i have to restart it to keep working i thinking of getting back to ff2