It's a very basic video that shows you everything you need to know about using the tools. If you're concerned that you can't get the same high quality out of an automatic finishing tool than you can by hand, manufacturers say you can put that thought aside, too. If you're committed to quality with hand finishing, you'll do a high-quality job with automatic tools. Once you've learned how to use the equipment, your quality will be the same. Once you've decided to take the plunge, you don't have to jump in the deep end.
Automated tools are available on a rental basis for a fairly cheap rate.
One caution, however. While you can toss your taping knives and mud pans around and suffer few ill effects, the parts in most automatic tools are made with very tight tolerances. Don't let them roll around and get smashed in the back of your truck everyday.