[I’ve heard of courses held in enormous lecture halls, in which the professor has no interaction with the students. I’ve never experienced one.]
I remember my older brother saying that a low level class was in an enormous lecture hall with a video feed from another enormous lecture hall where the professor was actually speaking.
That's robbery. Or fraud. Or something like that ...
A couple of my grad-school engineering classes were live-fed to a handful of students on an Army base a couple of hours' drive away. I felt a bit sorry for those guys; they really couldn't have the interaction with the prof that we did.