Compatible Games
Games that used the card include (not necessarily complete list):

Chisato Moritaka: Watarasebashi/Lala Sunshine
Falcom Classics (disc 2 of the limited edition)
Gungriffon (Japanese version only)
Lunar: Silver Star Story MPEG-ban (the only game that requires the card)
Moon Cradle
Nightruth Voice Selection: Radio Drama Hen
Sakura Taisen Hanagumi Tsuushin
Sakura Taisen Jouki Radio Show (Disc 2)
Sentimental Graffiti (Disc 2)
Ultraman Zukan 2
Ultraman Zukan 3
Vatlva
Wangan Dead Heat + Real Arrange
Yuukyuu Gensoukyoku Hozonban Perpetual Collection
Yuukyuu no Kobako Official Collection
Yoshiyuki Sadamoto Illustrations
The EU MK-80310 Video CD Card is incompatible with all of these games. The US version of Gungriffon still has MPEG movies on the disc but that they are not played during the game. Instead, the in-game movies have been apparently converted to Cinepak or Truemotion.

Compatible Demos
Mogitate SegaSaturn Vol.2 1998.2
Mogitate SegaSaturn Vol.3 1998.5
Mogitate SegaSaturn Vol.4 1998.8
Mogitate SegaSaturn Vol.5 1998.11
Mogitate SegaSaturn Vol.6 1999.2
Saturn Super Vol. 7
Saturn Super Vol. 9
Saturn Super Vol. 11
Segakore Sega Bible Mogitate SegaSaturn. Soukangou 1997.11
Tech Saturn Tsuushin Vol.5
Magazine articles
Main article: Video CD Card/Magazine articles.