[dgun]

http://oyc.yale.edu/

A wide variety of subjects. Lectures for entire semesters are available as video downloads, and also on youtube and itunes.

Open Yale Courses provides free and open access to a selection of introductory courses taught by distinguished teachers and scholars at Yale University.

If you are interested in the American Civil War, this is a great course:

http://oyc.yale.edu/history/civil-war-a ... struction/

Mr. Blight is a very good lecturer. I don't know if he has updated the lecture videos since I watched them last year, but I watched everyone and I thoroughly enjoyed the course.