Regarding Yuna: When Yuna 2 came out Hudson reprinted Yuna 1 and packaged it with an extremely short anime OVA, a minute or two, on a second disc. This is the only thing HuVIDEO about Yuna. If you get an original version it won't have this. They are easy to tell apart, the single CD case is the first, the double thick cases are the reprint.
This is probably the best and easiest to reference use of FMV on PCE. It looks really good, maybe 1/4 VCD quality, same as SegaCD, probably better. Too bad it doesn't do anything!