here comes some pointers
1) remove the VLAYER=DESTRUCTIVE in the voodoo monitor driver (this is only for bvisionppc/cvisionpp and cybergraphx)
2) delete the cgxvideo.library (P96 emulates this
in memory)
3) not all options work together
(like VLAYER and FULLSCREEN) if I remember correctly.
you are also not stating what kind of movie format it is about. this error message could mean that softcinema could not decode the movie.
you have installed all the xanim codecs?