How do Saturn games that require MPEG cards work?

This game:

Lunar: Silver Star Story Complete (MPEG Card Version) (JP, 07/04/97)

When I started to enter the game, it asked me to insert an MPEG card. How can I run it?

While I have never tried any, I don’t believe any of the Saturn cores have the the Video CD card implemented. Looking through the docs for Beetle Saturn, I do not see any mention of it. Not even sure any standalone emulators do either.

Looks like the list of games that were compatible with the cards is pretty small, and only Lunar required it.