general relativity: http://www.feynmanlectures.caltech.edu/II_42.html
quantum electrodynamics: "QED: The Strange Theory of Light and Matter" or http://vega.org.uk/video/subseries/8
standard model: http://quantumdiaries.org/2010/02/14/lets-draw-feynman-diaga...
conceptual core of quantum mechanics: http://scottaaronson.com/democritus/lec9.html
history of quantum mechanics: "The Second Creation" and "The Infinity Puzzle"