Check out this website (linked to from the title of this post). It is making available "full video courses and lectures from the world's leading scholars." A number of disciplines are represented, including law. At the moment, only two courses are linked to from the law site: Introduction to Copyright Law by Professor Keith Winstein from MIT, and Climate Change: Law and Policy by Professor William Collins of the University of California at Berkeley. The first of Professor Winstein's lectures deals with the basics of legal research and citation, among other subjects. Obviously, this site is a work in progress, but it's well worth returning to periodically to see if new content has been added. Thanks to Professor Susan Gannon for tipping me off to this site.