Lawrence Lessig, an advocate of balanced copyright law announced today that Warner Music issued a DMCA takedown notice on this presentation, which is most likely fully covered under the doctrine of fair use. He is a ardent supporter of fair use, and a lawyer, so he is going to fight this.
A keynote address given at the OFC Conference in San Diego, CA, this is a revision of a REMIX talk, distinguishing between parts of the 20th Century that were Read Only (RO) and parts that were Read Write (RW).