Here are a couple of free video editing programs. The first one is any video converter. The name says it all.
http://download.cnet.com/Any-Video-Converter/3000-2194_4-10661456.html?tag=mncol;1
The second one is Video Pad Video Editor. Now this one is a 14 day free trial. However, if you uninstall it, you will get the option of getting the free version. Very good for splicing videos and sound.
http://download.cnet.com/VideoPad-Pro-Video-Editor/3000-13631_4-10906278.html.