Thanks for hosting all these great lectures! How did you get them all?
Actually, we don't host any of the media files on our site, we just link to them. We've been collecting links to lectures for awhile and finally decided it would be worthwhile to put them all in one place.
I clicked on a link to the lecture and it didn't work.
If the media file or web page is missing, please let us know. If you got another type of error, it may be that you don't have the software on your computer to view certain types of media.