The video of the first lecture is posted. I omitted the class discussion and logistics at the end.
http://www.youtube.com/watch?v=N2yW6QzRq80
The slides for the each lecture are posted next to each lecture, and also reproduced here for your convenience. (slides for lecture1a) (slides for lecture1b)
(Update: Sept 7: higher quality version of the video posted and linked to here.)