Sites for learning the business side?
Most undergraduate media programs have a "The Business of..." course in their curricula. It used to be "The Business of Television" or "The Business of Film". Nowadays, it is probably listed as "The Business of Media" or "The Business of Digital Media."

Unfortunately, those classes seem to be offered only intermittently. As an undergraduate I found the business class I managed to take essential for understanding the industry I was trying to break into. Now, as a seasoned professional, I cannot understand why those courses aren't required to graduate. But those aren't the fun or sexy classes, unlike the production classes.

The most relevant MOOC I could find was on the music industry. I suspect most media programs haven't adopted online delivery because of the difficulty in producing media without the group work you get with an in-person class.