MPMovie player ViewController lag the video play in ios

I want to play play video on current viewcontroller with full screen. so i am using MPMoviePlayerViewController to play full screen video but problem is that it does not play smooth. it lag little bit while playing video. Here is My code which i am using to play full screen video which is store in my documents directory of phone/ipad

-(void)PlayVideo:(NSString *)videoFilePath
  {
NSURL *videoURL = [NSURL fileURLWithPath:videoFilePath];

NSLog(@"videoURL: %@", videoURL);

MPMoviePlayerViewController *playerVC = [[MPMoviePlayerViewController alloc] initWithContentURL:videoURL];

// Remove the movie player view controller from the "playback did finish" notification observers
[[NSNotificationCenter defaultCenter] removeObserver:playerVC
                                                name:MPMoviePlayerPlaybackDidFinishNotification
                                              object:playerVC.moviePlayer];

// Register this class as an observer instead
[[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(movieFinishedCallback:)
                                             name:MPMoviePlayerPlaybackDidFinishNotification
                                           object:playerVC.moviePlayer];

// Set the modal transition style of your choice
playerVC.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;

// Present the movie player view controller
[self presentViewController:playerVC animated:NO completion:nil];

// Start playback
[playerVC.moviePlayer prepareToPlay];
[playerVC.moviePlayer play];

  }
- (void)movieFinishedCallback:(NSNotification*)aNotification
 {
// Obtain the reason why the movie playback finished
NSNumber *finishReason = [[aNotification userInfo] objectForKey:MPMoviePlayerPlaybackDidFinishReasonUserInfoKey];

// Dismiss the view controller ONLY when the reason is not "playback ended"
if ([finishReason intValue] != MPMovieFinishReasonPlaybackEnded)
{
    MPMoviePlayerController *moviePlayer = [aNotification object];

    // Remove this class from the observers
    [[NSNotificationCenter defaultCenter] removeObserver:self
                                                    name:MPMoviePlayerPlaybackDidFinishNotification
                                                  object:moviePlayer];

    // Dismiss the view controller
    [self dismissViewControllerAnimated:YES completion:Nil];
   }
   }