It can be done. What equipment do you have to work with? With what you want, here's what I would do:
I would write the script (make it descriptive) in a way where you don't need video to understand what's being talked about. With the script ready, you can then add video to the already written script. Then, once you finish the video, you could just record the audio portion to a CD (I think), and then the video/audio to DVD.