##HCYoutubeParser
HCYoutubeParser is a class which lets you get the iOS compatible video url from YouTube so you don't need to use a UIWebView or open the YouTube Application.
It's really simple to get going
// Gets an dictionary with each available youtube url
NSDictionary *videos = [HCYoutubeParser h264videosWithYoutubeURL:[NSURL URLWithString:@"http://www.youtube.com/watch?v=8To-6VIJZRE"]];
// Presents a MoviePlayerController with the youtube quality medium
MPMoviePlayerViewController *mp = [[[MPMoviePlayerViewController alloc] initWithContentURL:[NSURL URLWithString:[videos objectForKey:@"medium"]]] autorelease];
[self presentModalViewController:mp animated:YES];