Currently, the video player is unfortunately not capable of streaming via Bluetooth to the big screen. We are looking into extending the functionality so that you can stream on the Chromecast via the App.
What we recommend as the current optimal solution for playing the videos of the App on your Smart/Apple TV is by using our Web App on the browser of your TV. Simply go to https://surfathlete.app and navigate on your TV as you would on your mobile devices.
We plan to have this feature by early 2021 for the App.