[rocky1138]

I think you're mistaken: what you've linked is a Dreamcast project. OP's youtube link is for the Sega Saturn (the console before the Dreamcast).

[mikepavone]

GDEMU is for the Dreamcast, but the same person/group also produced Phoebe and Rhea which are similar products for the Saturn. Those don't have a separate home page, but most of the menu entries at the top of the page have separate Phoebe and Rhea options.