Swift: How to airplay video using AVKit to Apple TV when AirPlay Device is Connected and Mirroring is Off

Question

Apple TV is connected on same WiFi network. AirPlay device is shown as Connected on AirPlay Picker. Video playing but only when mirroring is turned on.

Screens array count is 2 only when mirroring is turned on. Is there a way to display contents on Apple TV without even turning on mirroring.

How do I get Screen count 2 without turning on Mirroring on iOS device.

Here is my code:

func checkForExistingScreenAndInitializeIfPresent() {
    print("\n Total Displays Available:-:- \(UIScreen.screens().count)")        
    if UIScreen.screens().count > 1 {
        // Get the screen object that represents the external display.
        let secondScreen: UIScreen = UIScreen.screens()[1]
        let screenBounds: CGRect = secondScreen.bounds
        self.secondWindow = UIWindow(frame: screenBounds)
        self.secondWindow!.screen = secondScreen
        self.secondWindow!.hidden = false
        let airplayName: String = self.activeAirplayOutputRouteName()
        print("\n External Displays:- \(airplayName) :- Connected")
        print("\n Total Displays Available:- \(UIScreen.screens().count)")
        print("\(airplayName) bounds : \(secondScreen.nativeBounds)")  
    } 
}

func activeAirplayOutputRouteName() -> String {
    let appDelegate = UIApplication.sharedApplication().delegate as! AppDelegate
    let currentRoute: AVAudioSessionRouteDescription = appDelegate.audioSession.currentRoute
    for outputPort: AVAudioSessionPortDescription in currentRoute.outputs {
        if (outputPort.portType == AVAudioSessionPortAirPlay) {
            return outputPort.portName
        }
    }
    return ""
}