If you use Photoshop to produce graphics that will be output to video, then you’ll definitely want to check out www.PhotoshopForVideo.com. This site was created by Richard Harrington who is the author of Photoshop CS for Nonlinear Editors and is the person I call on when I have questions about outputting images to video. The Resources section of the site features will over an hour of free movies that describe how to create graphics for video.