I don't know, I suppose editing is preparing your clips (cutting/joining, using filters, etc.) for authoring. Once you have your videos/clips the way you want them you can try a couple of freeware authoring apps like DVDFlick, http://www.dvdflick.net/ or AVStoDVD, http://www.videohelp.com/tools/AVStoDVD. You can use something like Windows Movie Maker for basic editing, it depends on the format of your clips (avi, mpeg, mov, etc). VirtualDub, http://www.virtualdub.org/, is an excellent freeware editing tool for avi video.
If commercial apps is what you're interested in, maybe someone with more experience using them will post some suggestions.