Also, if you have a Saturn you can get a VCD card for it that from what I have heard on the boards works remarkably well. Their is a VCD add on for Playstation as well, but I havn't heard what type of quality video they put out, plus the PSX add on the back port that was taken out of later models.
You should probably get rid of the idea of playing VCD's on your DC, their realy isn't anything out their that can let it play VCD's at a good quality such as that of DVD players or Saturn (Like I said before, no idea how good PSX vcd player is).