academicearth.org
Lifehacker calls Academic Earth a "Hulu for academic lectures, pulling free lectures from Berkeley, Harvard, MIT, Princeton, Stanford, and Yale into one attractive, easy to navigate site," and gives it high marks. This is how Academic Earth explains Academic Earth:
"We are building a user-friendly educational ecosystem that will give internet users around the world the ability to easily find, interact with, and learn from full video courses and lectures from the world’s leading scholars. Our goal is to bring the best content together in one place and create an environment in which that content is remarkably easy to use and where user contributions make existing content increasingly valuable".
The videos play immediately or can be embedded elsewhere -- it's a very open site. You can set up playlists to watch or download later. You can choose lectures by subject, university, or instructor. Truly fascinating. Check it out.
