Allows videos to rotate in landscape when displayed in a portrait only iOS app

ViewController.m

#import "ViewController.h"

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    // We configure the video player to play a remote video
    NSURL *movieURL = [NSURL URLWithString:@"http://clips.vorwaerts-gmbh.de/big_buck_bunny.mp4"];
    [self.movieController setContentURL:movieURL];
    
    // We embed the video player inside the placeholder view
    [self.movieController.view setFrame:self.videoContainerView.frame];
    [self.movieController prepareToPlay];
    [self.movieController setShouldAutoplay:NO];
    [self.view addSubview:self.movieController.view];
}

- (MPMoviePlayerController *)movieController
{
    if (_movieController == nil) {
        _movieController = [[MPMoviePlayerController alloc]init];
    }
    
    return  _movieController;
}

- (BOOL)shouldAutomaticallyForwardRotationMethods
{
    return NO; // This way, we let the movie controller handle rotations itself
}

@end