Matt Cutts, after releasing videos under Session 4, Session 5, and Session 6 answering many questions regarding Gadgets, Google, and SEO, has come out with Session 7 and Session 8.
In Session 7, Matt answers queries regarding Google Analytics, detecting duplicate content etc. while he starts out with a fake commercial. In Session 8 Matt Cutts details Google Terminology such as index update, algorithm update and so on. For more see his blog.