Leonard Susskind Physical Minimum Lectures on Youtube.

Leo Susskind, one of the bright ones that brought us string theory, has an extensive collection of academic lectures as part of their Stanford’s Continuing Studies Series. I am pointing here to a web resource collecting all these lectures.

https://glenmartin.wordpress.com/home/leonard-susskinds-online-lectures/

Professor Susskind has also a blog at

http://susskindsblogphysicsforeveryone.blogspot.com