These were re-uploaded or corrected or some such to be working, at least they are working for me using a mac and Perian through Quicktime (they didn't use to). I love these lectures :) Maloney is pretty good at what he does, and he's pretty funny/goofy. Also! he has a set of lectures of mechanics at the Goldstein level which is amazing. They may or may not get into Hamilton-Jacobi theory but they definitely cover the main stuff up until then.