Lawrence Lessig and Creative Commons License

I've mentioned this before, I highly recommend watching these videos for everyone, most of all, those of us who are creating and sharing through the internet.
Lawrence Lessig presents it in a very interesting manner. He'll make you laugh too! He is best known as a proponent of reduced legal restrictions on copyright, trademark and radio frequency spectrum, particularly in technology applications.
I don't understand everything yet, and I intend to watch it again several times ;)