I watched those a while ago. They might seem really long at first but I can confirm that they are really good. I was fascinated by how much more sense our emotions and behaviour make if you learn a bit more about how the brain is wired and how it evolved.
Sapolsky is also a very entertaining writer! An excerpt from one of his books ("A Primate's Memoir") is here: http://www.npr.org/books/titles/138066966/a-primates-memoir#... , but my favorite excerpt from the book is that where he talks about tranquillizing baboons with a blow dart gun.
For me one of the best teachers you will find online