I'm sure that Apple will come along with the "official" recording of this event in due time but since I recorded it using ScreenFlow for my colleagues in Georgia, I thought that it might be of interest here as well. Thus, take a look at:
http://hercules.gcsu.edu/~flowney/screencasts/All_New_iTunes_U/
... using desktop, laptop or iOS systems. It should adapt to whatever you are using.