MediaPlayer example in Detailed Description is missing id

Item {
    MediaPlayer {
        id: mediaplayer
        source: "groovy_video.mp4"
        audioOutput: AudioOutput {}
        videoOutput: videoOutput
    }

    VideoOutput {
        anchors.fill: parent
    }

    MouseArea {
        id: playArea
        anchors.fill: parent
        onPressed: mediaplayer.play();
    }
}