Html5 videos: video periodically freezes while audio continues to play. Firefox 12, Linux, Centos 5 up to date.

whenever I view a YouTube video on my linux box (Centos 5.8, fully updated) using Firefox12, YouTube always delivers the html5 video to me instead of Flash. This would be fine, but intermittently the video stops moving (while the audio keeps playing). I click the (I don't know what it's called) slider for the current position and the video will start moving again. until it pauses next time, anywhere from a few seconds to a few minutes.
I don't know why it delivers html5 instead of flash, on my laptop using centos 6 and firefox12 I get flash video. Is there someway to configure Firefox to get flash instead? If not, I'd appreciate help in fixing the pausing video component.

Perform the suggestions mentioned in the following articles:
* [https://support.mozilla.com/en-US/kb/Template:clearCookiesCache Clear Cookies & Cache]
* [[How to clear the cache#w_clear-the-cache|Clear the Network Cache]]
Check and tell if its working.
IF it still doesn't work, then Start Firefox in -> [[Safe Mode]] to check if your add-ons/extensions are causing the problems.
* Also see this article -> [[Troubleshooting extensions and themes]]
Check and tell if its working normally while using Firefox in [[Safe Mode]].
You can also try to clear the Flash cookies as mentioned in the following articles:
# Flash Website Storage Settings panel:
#* http://www.macromedia.com/support/documentation/en/flashplayer/help/settings_manager07.html
# Global Storage Settings Panel:
#* http://www.macromedia.com/support/documentation/en/flashplayer/help/settings_manager03.html
# Flash Local storage settings Help:
#* http://www.macromedia.com/support/documentation/en/flashplayer/help/help02.html

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Video freezes but audio continues

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mmyers wrote:
Help! I have been having this problem for a couple of weeks now. It seems to happen randomly. I will be watching a video on YouTube for example and then the video will freeze and the audio will continue. The only way out is to do a system reset. I have done a factory restore, but the problem continues. I have run diagnostics and the only thing it says is something about the network connection.
To be honest that's the first time I've ever heard anyone running Diagnostics and something being reported by it!
You may think your network's fine but AppleTV clearly doesn't.
What's the message?
However, the network works fine. I have had this happen to a TV show that I purchased also. I had to reboot the Apple TV several times just to get through the show. Very annoying. What could be causing my problem?
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Html5 videos: video periodically freezes while audio continues to play. Firefox 12, Linux, Centos 5 up to date.

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