I've been using QuickTime for video ever since it appeared on the Mac. I've used Avid VideoShop, iMovie, Adobe Premiere, and Final Cut Pro. There is also a lot that can be done using Quicktime Pro. QuickTime allows you to do a lot of interesting things like adding text tracks to video, enabling HREF tracks that trigger slides in another browser frame, adding a chapter pulldown menu, applying masks to the video, and a number of other things. Other than iMovie, I think I like using Adobe Premiere the best for editing video. It is somewhere between iMovie and Final Cut Pro in capabilities and learning curve. I was very happy to learn that Adobe would again make Premiere for the Intel Macs. They were going to stop support for Macs after version 6.5. At any rate, here are a couple samples of QuickTime video I've done.
Promotional video for the Faculty Multimedia Center:
QuickTime Pro also lets you add text tracks to movies. This is done by creating a text file with the time code of when you want each phrase to appear. This is then imorted into the QT movie and saved as a text track. I have created some software called MovieCaptioner that makes this process very easy. It is being used all over different departments at Penn State and also in many government agencies such as NASA, Department of Homeland Security, Centers for Disease Control, and many other colleges and independent video production companies.