The Mathematical Sciences Research Institute (MSRI) maintains an impressive archive of streaming video lectures and presentations. This site contains archives of the videos from various workshops and special topics held before 2004. From the Fall of 2002, of particular interest is the "Introductory Workshop in Quantum Computation." It consists of fifteen lectures, each with complete textual slides provided in addition to the roughly hour-long presentations. Quantum computation is a science that is still in its infancy, and the theories discussed by the lecturers are significant. There are also videos about commutative algebra, random matrix theory, and semidefinite programming.