I originally posted this at http://dtrace.org/blogs/brendan/2011/10/02/dtrace-book-short-videos.
The DTrace book was launched earlier this year, and I just filmed a couple of new short videos about it. Here are:
DTrace book Introduction
DTrace book and Solaris 11
You may also like to see some of the other videos I've had filmed in the past, many of which include DTrace demos.