Here are some very good videos on Kantian Ethics from a 2003 conference at the University of San Diego. The highlights include Allen Wood on Kant and Fichte and Property, Henry Allison on the Categorical Imperative, Stephen Darwall on Kant, Fichte and the Second-Person Standpoint, Robert Pippin on the Kantian State, and, what looks to be an interesting panel on the categorical imperative. These are not the only talks. There are actually 23 videos in total, all devoted to Kant and ethics. Unfortunately, it does not look like they have the papers online.