Raymond Hettinger's talk about good code reviews -- https://www.youtube.com/watch?v=wf-BqAjZb8M
Carmack's talk about functional programming and Haskell -- https://www.youtube.com/watch?v=1PhArSujR_A
Jack Diederich's "Stop Writing Classes" -- https://www.youtube.com/watch?v=o9pEzgHorH0
All with a good sense of humor.