Why dont universities record lectures and broadcast them online? ITS BETTER UNDERSTOOD AT HOME REWINDING!?

Some universities, inaddition to having classes also do have videos of lectures that they post on iTunes as they have an agreement with iTunes. My university does that but it's fairly new so it's not for all courses offered at the university. Some professors, on their own, use youtube to post recordings of the lectures...so I think it really does depend on how the professor/university believe is the best way for their students to learn...ultimately going to class and attending does force you to listen and take notes which does get some of the material stuck in your head...