The 23rd Chaos Communication Congress (23C3) has ended and videos are available under the Creative Commons “Attribution-NonCommercial-NoDerivs 2.0 Germany” (BY-NC-ND) license (local copy). They’ve published their videos in Ogg Vorbis+Theora and other formats as well.
One of the highlights is a talk from Prof. Lawrence Lessig of Stanford University on “Code vs. Culture” (audio+video, audio). More links to more videos as I get time.