VideoMaterial.swift

class ViewController: UIViewController {

    @IBOutlet var arView: ARView!
    var videoPlayer: AVPlayer!

    override func viewDidLoad() {
        super.viewDidLoad()

        guard let path = Bundle.main.path(forResource: "myFileName", ofType: "mp4") else { return }
        let videoURL = URL(fileURLWithPath: path)
        let playerItem = AVPlayerItem(url: videoURL)
        
        let videoPlayer = AVPlayer(playerItem: playerItem)
        self.videoPlayer = videoPlayer

        let videoMaterial = VideoMaterial(avPlayer: videoPlayer)
        let videoPlane = ModelEntity(mesh: .generatePlane(width: 1.6, depth: 0.9), materials: [videoMaterial])

        let anchor = AnchorEntity(plane: .vertical)
        anchor.addChild(videoPlane)

        arView.scene.anchors.append(anchor)
        
        videoPlayer.play()
        
        NotificationCenter.default.addObserver(self, selector: #selector(loopVideo), name: NSNotification.Name.AVPlayerItemDidPlayToEndTime, object: playerItem)
    }

    @objc func loopVideo(notification: Notification) {
        guard let playerItem = notification.object as? AVPlayerItem else { return }
        playerItem.seek(to: CMTime.zero, completionHandler: nil)
        videoPlayer.play()
    }
}