This is an unalloyed good in the world. To make available some of the best lectures anywhere is wonderful. Not everyone gets a chance to go to these universities, but now just about anyone can listen and learn. The commuter on the train or in the car can listen to philosophy lectures. The farmer in the tractor can be studying statistics. The teenager walking to school can listen to business theory. Some kid can watch an astronomy lecture and be inspired.
Never before in human history has so much knowledge been available to the masses. This is a very good thing. Who knows what Mozart-in-the-rough will now be reached who otherwise might have spent a lifetime in relative ignorance through the circumstances of his or her birth?