Try http://videolectures.net/ http://videolectures.net/ Peteris Krumins collated a set of Science and Computer Science lectures - http://freescienceonline.blog

Try http://videolectures.net/ http://videolectures.net/ Peteris Krumins collated a set of Science and Computer Science lectures - http://freescienceonline.blogspot.com/ http://freescienceonline.blogspot.com/ He blogs from there too although the catalogue is not huge.