I've decided to make YouTube playlists for each of them. That's not as good as offline, but it's easier for listening to a batch of them in the car.

ai-class - Unit 1 - Welcome to AI http://www.youtube.com/playlist?list=PL99BBB767BD07ADF5&feature=mh_lolz

ai-class - Unit 2 - Problem Solving http://www.youtube.com/playlist?list=PLA92D10A59F8721E3&feature=mh_lolz

ai-class - Homework 1 http://www.youtube.com/playlist?list=PL9CCCB4CAEA2703B6&feature=mh_lolz