@objc func onRotated() {

    // portrait
    if UIDeviceOrientationIsPortrait(UIDevice.current.orientation) {
        playerController.view.frame = CGRect(x: 0, y: 200, width: UIScreen.main.bounds.width, height: 250)
    }

    // landscape
    else if UIDeviceOrientationIsLandscape(UIDevice.current.orientation) {
        playerController.view.frame = CGRect(x: 0, y: 0, width: UIScreen.main.bounds.width, height: UIScreen.main.bounds.height)
    }
}