There are currently four videos - I still have editing work to do on the last two or three.
Penao is a great instructor and mentor. His former students include Anderson Silva and Paulo Filho. Penao has recently returned to Brazil.
Despite a bit of a language gap, I learned a lot from him about the history and culture of jiu jitsu in Brazil - not to mention his seemingly bottomless reservoir of technical knowledge.
Attacking the turtle seemed to be a specialty of Penao's so I concentrated the series on those techniques.