Apple TV is free for one year, then don't forget to cancel. Apple TV is installed after purchase and can be used free of charge for one year. Only a limited range of services is free, the lion's share is subject to a charge.
As far as I know, you have to redeem it with the device. That's how it's always worked with iPhones. It then runs via Apple and not via Digitec. Otherwise see here: https://www.apple.com/de...