Strobist Preliminaries Video
This short video was put together to help with basics of gear and terminology for those who want to learn how to light using off-camera shoe-mount flashes. It lays the groundwork for jumping into David Hobby's phenominally popular Strobist blog.
After viewing, your next stop is Strobist "Lighting 101"
Notes:
This tutorial is also available on Viddler at http://www.viddler.com/since76/videos/21/. Thanks to Tomas Carrillo for converting and posting it. It's also available on YouTube at http://www.youtube.com/watch?v=lKAD7leNOVY.
This was created with Soundslides Plus (http://soundslides.com). Audio was edited with Audacity (http://audacity.sourceforge.net).
Sorry, I can't give you "the file" for this thing—the slide presentation is not a monolithic video file, it consists of more than 50 separate files.