I think smaller classes are trickier to online-ify in a way. With large lectures, they're already somewhat public, so recording them doesn't change things a lot. With a 10-person class, you often have more of a seminar-style discussion, with a lot of back-and-forth between students and professor and less of a pre-planned, one-way lecture. That might be harder to record well, and I think the seminar-style discussion might also suffer if students were "on the record", knowing that they were being broadcast rather than just chatting with the 10 people in the room.