In today's high tech world, switchers boast many more options than the basics described here. The most sophisticated--and expensive--switchers have built-in Digital Video Effects (DVE) machines. DVE machines create custom transitions, such as the bouncing screens and titles mentioned at the start of this column. Not all effects are available on all switchers and, as you might imagine, cost generally rises with the quality of effects.
Super snazzy effects aside, the switcher's most vital function remains flawlessly switching from one video source to another. Don't get boondoggled by a piece of gear just because it can turn your video into a boat and sail it off the screen. If it can't make a clean switch between signals, it's not worth it.
Nothing annoys viewers more than a video that spits and sputters between every cut and transition. Mistakes like take the wind out of any production.
With a switcher, you can count on smooth sailing.
Videomaker contributing editor Mark Steven Bosko is the vice president of marketing for a commercial production company.
Color 
Getting Started With Free Video Editing Software 
Apple Pro Training Series : Final Cut Pro 5
Avid Xpress Pro and DV On the Spot
Avid Xpress Pro Editing Workshop
The Focal Easy Guide to Final Cut Pro 6
Videomaker Multimedia Tutorials - Complete Set (DVD-ROM)
Fix It in Post
Video Glossary of Terms
Wedding Videoland