I used to watch youtube videos everyday on my ipad2, it worked well until a few days ago. I use the youtube apps, the search function is fine, and I can see thumbnail of the video fine, but when it started to load after a while it said "movie format not supported", and then the screen went black, i have to return to the home screen. I tried it repeatedly with the same result, i also try to open it through safari /m.youtube, and encounter the same result, it's as if my ipad2 wont play any kind of video at all. This really confuse me since a few days ago everything was fine, the "movie format" message does appear but very rarely, and if i try to re-load it would play. I dont have any problem with cellular network, since i could use the internet just fine. I try using google, but i can't find any solution to this problem, maybe someone here can help me?