Softwares for youtube publishing

For basic movie making,
1. windows Movie Maker. (Windows)
2. iMovie. (Mac)

If you want to make a movie from what is displayed on the screen,
3. Camtasia (windows)
4. SnapzPro site1, site2(Mac)

Sometimes your video file is huge, so you want to compress them.
I recommand "divx fast motion" compressor,
5. "ace"