Hey you all i have found a solution to fixing youtube.com on your ps3 browser.. simply go to www.hidemyass.com and then scroll down and type www.youtube.com in the proxy address bar. VOILA youtube videos WORK AGAIN on ps3 !! Glad i discovered this !!!!! YOUR WELCOME
Why not just use the official Youtube app for the PS3... I am and in HD.
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The youtube app sucks and youtube.com videos quit working a few days ago on ps3 browser so i discovered a way to get them to WORK again on the BROWSER simply by going to www.hidemyass.com and then scroll down and then type www.youtube.com in the proxy address bar and VOILA youtube.com videos WORK again on ps3 browser !!
The app can be buggy. I wouldn't recommend using one of those sites though, especially if you're going to sign in with your personal info.
PS3youtube.com doesn't need a sign in. I have had no problems with it since I first used it.