The MorphOS CD Filesystem doesn't recognize VCD for the moment, but
may be added in the future. By the way, it's implemented in Linux but
never worked for me.

About Mplayer, I found 4 ways to read raw data on a CD, and of course
usually only once works per drive. I put the most compatible in
priority and I auto-detect some drives like TraxData and Plextor,
Samsung ...).

Then for VCD send me the log of MPlayer with -v as well as the
SCSIUtil (on Aminet) log:

SCSIUtil -dtoto.device x -ir
where tot.device your device
and x the unit

Bye