Practicalities - using the software
This will take practice, but it is actually much much easier than it sounds. One of the BioEthics Live project teachers said she has been amazed at how much her students have achieved in such a short amount of time. So it can't be that hard.
A good way to learn video editing is to follow some of the excellent ready made video guides on the web. Here are a few useful examples.
Windows Movie Maker
Apple Mac - iMovie
Editing methods and strategies