I'm curious if he still has a copy. I really should ask him at some point. I wish we knew better back then, though, but again perhaps with Vidéoway all we could have done is recording every single game footage on VHS, as well as footage of the other Videoway services available at the time...
EDIT: This shows how the interactive TV channel looked like during a quiz at 11:52 https://youtu.be/Eq_oS9GvBLM?t=11m52s
But it was really like those old game consoles that were just a VHS tape where you had to press buttons at specific moments, except in quiz form instead of reflexes.
EDIT: Here are screenshots of some more games in there: