I'm on an ipad 2 (5.0.1) and jailbroken. Aside from the youtube app, i have itubelist and protube installed (i've tried reinstalling both and did not affect). The problem is that i'm not able to play youtube videos on ANYTHING other than the youtube app. All i get is a black video with spinning wheel. Normally this is not a problem as i would just use the youtube app which seems to work flawlessly, but it affects watching videos on facebook, twitter, or any other website that i'm currently viewing. I've tried safari, icab, grazing, dolphin browsers and same thing with each one. I know the possibility of downgrading from 5.1 to 5.0.1 may be an option in the future but for right now i dont think i can restore and keep my jailbreak, unless i'm not aware of it. If someone has any options or suggestions, please comment cause i'm at a loss and really don't want to lose my jailbreak, but it's incredibly annoying to not be able to play videos that are shared with me on facebook/twitter etc.