I have had this problem ever since I upgraded to LION, I have tried everything and still have the same problem. Today I downloaded a software update which changed safari's display and I thought maybe they'd fix the issue. No such luck 😟
Like I said, I've tried everything, uninstalling flash player, installing it again, downloading all kinds of plug-ins and extensions, and nothing has worked. Other people in my office also have the same issue with their mac and have been unaible to fix it.
I'm just tired of this problem, I used to listen to music all day long on my mac at work and now I can´t. PLEASE HELP US APPLE!!!!.
By the way, the software update did change the problem, now it takes longer to freeze, maybe a little bit more than a minute, before it was always under a minute and the video would freeze.