Here is a link to a set of Feynman's lectures in physics:
Richard Feynman: The Messenger Series
made available by Project Tuva
Dr. Feynman has been one of the most influential scientists of the last century. His lectures are amazing to watch and his books are pleasure to read. He was a type of scientist (along with Carl Sagan) who had a unique approach to science and an ability to bring it to masses in almost magical ways.
Thanks, Bill Gates for making this video available...