title: How can I play a movie locally with the MPMoviePlayerViewController?
body: <p>I have an mp4 file called lebron.mp4 in my Resources folder:</p>
  
  <pre><code>-(IBAction)videoButtonClicked:(id)sender{
      NSString *url = [[NSBundle mainBundle] 
                       pathForResource:@"lebron" 
                       ofType:@"mp4"];
  
      MPMoviePlayerViewController* moviePlayerViewController = [[MPMoviePlayerViewController alloc] initWithContentURL:[NSURL URLWithString:url]];
  
      moviePlayerViewController.view.backgroundColor = [UIColor blackColor];
      [self presentMoviePlayerViewControllerAnimated:moviePlayerViewController];
  
      [moviePlayerViewController release];    
  }
  </code></pre>
  
  <p>Displays the movie player, but the movie doesn't play. Why?</p>