Hmm. Is it tied to the laws and funding with regard to "pub ed"? And I ask because all kinds of people attend "lectures" and then write about those lectures in many types of print/video medium.
A friend who is a professor looked into some of that issue and it appeared there were copyright issues regarding taping for instance.
I believe the lectures are the property of the college.
I'm not saying put that is cement and let it harden, just what someone I know found out on their own.