Take aside the crew that does all the filming and editing and the fact that they can have guests like Zuckerberg or Ballmer,and you have a passionate tutor,who is willing to go extra mile. When I was at school, I only had 2 teachers like this- won't forget them for my entire life. At uni, most were so so( as the whole uni itsel) and often more interested in anything but teaching. However, briefly,we had an ex HSBC guy,who was the finance professor. The guy was funny, captivating and knew his shit inside out. When asked why he left banking,he did say he was finding academia more interesting. And he was a perfect fit. A lot of people are good at doing research but they may not be very good teachers,or not at least in the setting most of us are familiar with( large audiences,one guy delivering knowledge). I had a chance to watch som recorded lectures from MIT, Harvard,and some other famous institutions and the quality of teaching some( not all though) manage to deliver is exceptional.