The videos linked here cover the same material as the Lesson pages and Lab pages on this site. If you learn new material better through video than through reading, you may want to watch these, and use the Notes and Lab only as supplementary material. There are links in the topic pages and labs pages to the associated videos as well.

The physical computing videos live on Vimeo in this collection.  Many of the descriptions on Vimeo will have a table of contents linked to times in the video where particular subjects are covered.

Check out this excellent series on debugging from Roopa Vasudevan and Clay Shirky as well.