Holy crap, check this out.

Tons and tons of documentaries, free for all. I just LOVE me a good documentary.

http://topdocumentaryfilms.com/all/

Just found this while searching for some lecture about boolean algebra.

This is a course list created for Indian universities shared for everyone to learn from. Almost every lecture is video and intricately explained in every detail. Every course have hours of video, all free.

Most of the teachers have a rather thick indian accent, but after a video or two you don't even notice it anymore. Don't let the fact that you see a woman in traditional indian clothes fool you, these people lay down the LAW in teaching.

http://nptel.iitm.ac.in/courses.php?disciplineId=108

Seriously, this is the most monstrous fountain of scientific knowledge I have ever found on the interweb, don't miss this!