I think it is inevitable with online courses of this scale, that the instructor recorded for the video lectures can't be involved on the day to day of the cours

I think it is inevitable with online courses of this scale, that the instructor recorded for the video lectures can't be involved on the day to day of the course. It is the same for e.g. Coursera courses where it is peers and a bunch of students from the university answering questions in the forum not the professor. I quite like the model of Schoolism.com art classes where you can either pay a monthly subscription for all access, start/finish any time or pay a quite a bit higher fee per course with fixed schedule and personalized feedback from the instructor