Hi big,
Welcome to PCHF.
IT's not quite that simple. It will not work the same way as a DVD-Writer for a PC. You will need to do it the old fasioned way, play the video back on your PC, and at the same time, record on your DVD Recorder.
To be honest, by the time you buy all the connections you need to connect the two together, you may as well have bought a DVD-Writer for the PC, and it's much easier to use. It also depends on if your graphics card even has a S-Video output?
Shown as the middle port above.
[Moved to Graphics]