I just mentioned yesterday Lessig and company’s p2p Politics.org site which is gathering election-related video, primarily ads of one kind or another.
Well the Internet Archive: Election 2004 site, with 462 movie files (as of the moment), is on another scale entirely. With debate footage, candidate ads, interest group ads, and anything else you can think of, the collection is sortable alphabetically, by topic, by recent additions, by “batting average” (percentage who download after reading the description), by popularity (number of downloads), as well as a list of “Staff Picks.”
Most popular currently is a class on the Constitution taught by Libertarian presidential candidate Michael Badnarik.
This is an exceptional resource.