It’s not as easy as you might think, because Swisscom has invented different parallel use regulations for each form of video stream.
So it’s not the same situation whether you want to watch a “normal” TV stream or a channel from an additional package, etc.
The help link to the detailed regulations is already included in one of the previous posts, so you can take a look there and interpret how you understand it for yourself.
Does it really have to be so complicated for customers with the additional packages?
Unfortunately I don’t know myself, but Swisscom seems to be convinced of it 🙂
Hobby-Nerd ohne wirtschaftliche Abhängigkeiten zur Swisscom