Hi
At The Massachusetts Institute of Technology (MIT) website there are some video lectures.

They are flash videos to be viewed in the browser.
Here:-
http://mitworld.mit.edu/
It's also possible to download the files to view with a media player (such as VLC) or mp4 player.

I've put together a 'how to'.
Here:-
http://ronbuntu.blogspot.com/2010/03...-from-mit.html