I have only ever taught lab classes, and even in those groups of 10-14 people, getting people comfortable enough to ask their questions took a skill (I don't know if I ever got the hang of it) and constant attention toward not shutting people down. The times that the class was split into lab-partner teams of 2 people, and I roamed between those teams, the questions were far more free-flowing, and about basic/fundamental concepts. Letting me know I probably wasn't covering those kinds of concepts well enough other times, but I wasn't getting feedback on it because no one had wanted to ask.
In my possibly biased and very limited experience, it was usually students with more "in-your-face gruffness" that would speak-up in larger groups to ask about basic things I wasn't explaining as well as they needed. It made me appreciate that personality type more.
The point though is then it's not the same teaching--- if I'm recording something For Official Broadcast, it's a different kind of thing than if I'm having an informal seminar with 20 people in a room where we all (at least sort of) know each other. I'll be more formal and less chatty, students will be less free with their discussion too, etc.
I don't think there's anything wrong with a more formal, archival-intended lecture from the podium, like a keynote speech or a big auditorium lecture. But I don't think it should be the only kind of thing to exist, either. I think it should be possible for people to discuss and learn in smaller groups without anyone (teachers or students) worrying that every single thing they say is on-camera, 1984-style. I mean, apart from me; do my students want every single question they ask in class, some smarter-sounding than others, to end up on the internet?
I do support making the materials more widely (and ideally, freely) available--- course notes, slides, papers, tutorials, textbooks, etc. It's just actually recording people against their will in a setting where they should be able to feel free to discuss & ask questions that has the weird 1984-ish vibe.