最小限で動画再生したい

AVFoundationを用いた最小限の動画再生してみるだけのコード

        let bundle = NSBundle.mainBundle()
        let url = bundle.URLForResource("samplemovie", withExtension: "mov")

        self.playerItem = AVPlayerItem(URL: url!)
        self.player = AVPlayer(playerItem: self.playerItem!)

        let playerLayer = AVPlayerLayer(player: self.player)
        playerLayer.frame = self.playerView.bounds
        playerLayer.videoGravity = AVLayerVideoGravityResizeAspectFill
        self.playerView.layer.addSublayer(playerLayer)

        self.player?.play()

playerViewは表示させたいUIView