If I read Scott's post correct, he is interested in the Time is Tight part of that you tube demo....
Scott,
I don't think it's an onboard style on any Yamaha keyboard. That Time is Tight style that Voncken is using there is a premium style. You can find it at Yamaha Musicsoft. There are two versions that sound more or less the same. The oldest is called Memphis8Beat and I think Yamaha later on revamped it for later keyboards and changed it's name to TightOrganBeat.
As usual they are kinda sloppy at that website by letting both stay under their own name instead of removing the older one. Better not buy them both. As said the TightOrganBeat is the better sounding one. You can listen to it at their site.
https://eu.yamahamusicsoft.com/style-files/tight-organbeat-5regards,
Peter