WOW.... that box is an old one if it has the "S" video output on it.
A new DVD player would be a better choice, one with a true HDMI or RGB component output. (those are outputs on that box, not inputs)
Now days they cost very little.
If you want an even better video source go with a BlueRay player, they will still play your DVD's and the BlueRay videos (and audio) will blow you away.