Not sure if it's something I've installed recently or just an issue with the jailbreak, but ever since I jailbroke my iPhone 4 I seem to get a lot of "this video cannot be played" errors in YouTube... Has anyone else had this issue? I see a lot of posting on the net about back in the iOS early days it seemed prevalent, but went away... I'd say it does it on about 50% of the videos I try to play in the youtube app.