the_mog wrote:the easiest way is simply to use Windows movie maker..
Indeed. One point, though, is that many digital cameras record their movies in the utterly hateful Apple Quicktime format - .mov. You can't do a thing with these unless you buy the full version of Quicktime (not simply the free player). However! Some lovely, lovely people have provided a 'free'* convertor for this and much, much more. It's called RAD Video Tools, and is fantastic, and everyone should have it on their PC.
http://www.radgametools.com/bnkdown.htm
*Actually, you can make a donation, if you want to. I did: they thoroughly deserve it for saving me from stinking Quicktime files.