You can do that by adding a notification handler on MPMoviePlayerDidExitFullscreenNotification
as that notification gets sent once the user taps on the DONE Button.
Somewhere in your initializer
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(MPMoviePlayerDidExitFullscreen:) name:MPMoviePlayerDidExitFullscreenNotification object:nil];
Now implement that handler:
- (void)MPMoviePlayerDidExitFullscreen:(NSNotification *)notification
{
[[NSNotificationCenter defaultCenter] removeObserver:self
name:MPMoviePlayerDidExitFullscreenNotification
object:nil];
[moviePlayerController stop];
[moviePlayerController.view removeFromSuperview];
}