This software looked fantastic. It allows you to catalogue video footage in much the same way as you do photos in iPhoto. You can add descriptions and info that will be useful for you to find clips at a future date. It handles everything that you want to throw its way, including Quicktime and DV format material. The effects of the video slideshows are out of this world. You can export individual sections of video clips to iMovie or Final Cut to be added to an ongoing project.

It can be tried out for free at:
http://www.aquafadas.com/index.html

Educational rates are available.
From arounf 40€