Berkeley Puts Full Courses on YouTube

I don't get it. On the one hand, this practice fits with my prior story on making prior lectures accessible to make it easy for students to catch up on missed lectures or review important concepts. On the other hand, what gives these professors the right to convert intellectual properties into public domain content? For the UC system, this should be approved at the Regent level. For such a policy to be enacted, the Regents need to explain to tax payers of California how it benefits the constitutents and their best interests are protected and assured.