Depending on your video editing software you can convert the project file to a 'DVD', If you look at the directory of a DVD You will find 'VIDEO_TS' and 'AUDIO_TS', no actual videos that you can playback, Copy the Video_TS and Audio_TS folders to the route of your DVD In Nero. and Burn.
Or, I remember correctly Nero can support .avi files and will encode them when you burn the DVD, I don't know of a single (Assuming your on a windows machine

) Piece of editing software that won't convert any video format (That is compatible with the software in the first palce) To .avi
Good Luck!