Question

Firefox cannot play youtube videos (only from youtube, other video sites work fine)

Since about a week ago firefox in my laptop cannot play videos from youtube (only from youtube, videos from other sites and flash games work fine), both on the site or embedded on other site. It just shows "an error occured. Please try again later" I'm using firefox 13.0.1 and the latest flash plugin. My laptop is i5 with win7 64 bit and it's clean, no virus or malware.

I've tried all the solution posted here but nothing works. I've tried uninstall-reinstall both firefox and flash, disabled add-ons, safe mode, downgrade to earlier flash, uninstall realplayer, changed dns, reconfigured my modem, called my good-for-nothing ISP (perhaps connection related?), still cannot play videos from youtube.

I've tried using different computer, I used my old winxp pc with older version of firefox (with same configuration as the firefox I'm using in my laptop) and my ipad, they can play videos but the playback is stuttering which never happened before. Strangely enough, I tried chrome (on the same laptop) and it works well, no stutters. Does this problem has something to do with firefox updates, flash updates, both, or something else?

Please help me, I don't want to go back and forth between browsers just to see video in youtube and I really don't want to change browser. Thanks!

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