Playlists of full lecture series for dozens of courses.
Departments with content here include:
Ecology and Evolutionary Biology
History of Art
Italian Language and Literature
Molecular, Cellular and Developmental Biology
See also the Open Yale Courses web site, which opens with:
Just when I was ready to dismiss YouTube as the place for short, home-made clips of people's cats and teenage pranks, Google buys YouTube and adds a host of features, improved indexing, cleans up the copyright management, and now adds new, functional viewing page features (March 2010).