seems to be an ogg stream (??)
if so, you'll need a direct show filter for ogg/vorbis (ogg is a container format as avi, vorbis just some codec, you'll also need the required codec, bsplayer can tell you which one, when you got it running)
look at this page for ogg/vorbis stuff:
http://www.vorbis.com/software.psp?pid=2
good luck (i'm not sure if this will help a suffix doesn't really tell you much about the included data)