First, you need an Apple TV or AirPlay 2-compatible smart TV and a mobile device capable of AirPlay 2. You can confirm AirPlay2 capable devices on Apple Support's site here.
- Connect your iOS device to the same Wi-Fi network as your Apple TV/AirPlay 2-compatible smart TV.
- Play the Practyce class you want to cast on your iOS device.
- Tap the AirPlay icon on the video viewer.
- Choose your Apple TV or AirPlay 2-compatible smart TV.