Registration on a Smart TV requires registration in MyARTE via the website or via the ARTE app.
The advantage:
You can sync your watch list and continue to watch it on all streaming devices where and when you want.
A watch list created via the website or on the ARTE app is transferred to your TV set and can be viewed there.
Thats how it works:
1. Generate a code via MyARTE in the section "Profile" - "TV Login".
2. To log into your MyARTE profile via Smart TV or the Apple TV app, enter the code there.