I guess it is an Youtube issue. I also have the same problem under Firefox and Linux, maybe some older browsers on Window will also have the issue -
or the mobile platforms too. The problem appears to be the "cookies" management under Youtube, it appears to crash the Flash Player v 10 or 10.03. The
only way to play it is to block the Youtube cookies. In firefox you can do it this way :
1)Go to Tools, then Options
2)Choose the Privacy tab.
3)There is a drop list, saying "Remember History" or something like that. Choose "Use Custom History" instead
4) In this window, choose the button called "exceptions"
5) Type what site to have the cookies blocked - www.youtube.com , then BLOCK button will add Youtube to the list with blocked cookies.
If your issue is due to Flash and Youtube conflict, it should be able to play right now.
Problem: you will not be able to log to Youtube. as Firefox will forget your log-in each time you access Youtube.
Other websites are playing fine.
Let me know if this helps!
Cheers.
edit on 16-3-2011 by Romanian because: (no reason given)