You have access to a limited list of channels due to the activated VPN, or you are in a country where TVteka doesn't work.
Apple TV
Viewing on Apple TV is possible only by using AirPlay.
You can read more about using and connecting AirPlay on the Apple website.
You must have an AirPlay compatible device (iPhone, iPad or iPod touch) to use Apple TV. For the full functionality of the service you must have the current version of the Apple TV Software.