This is part 1 in a series of introductory videos for AutoCAD 2012.
Part 1 provides a basic overview of the AutoCAD user interface along with demonstrations of the line command, the polyline command, and the erase command.
Run-time is approximately 12 minutes.
I have been developing and using my own video tutorials for teaching CAD since the late 1990's. The videos have been very beneficial for my students.