I've just updated my build of Mplayer at http://smedley.info/os2ports
Fixed in this release:
* Detection of SSE and SSE2 CPU capabilities now works
* Playback in a PM window now works
* Updated to latest SVN code
MPlayer is a movie player which runs on many systems (see the documentation). It plays most MPEG/VOB, AVI, Ogg/OGM, VIVO, ASF/WMA/WMV, QT/MOV/MP4, RealMedia, Matroska, NUT, NuppelVideo, FLI, YUV4MPEG, FILM, RoQ, PVA files, supported by many native, XAnim, and Win32 DLL codecs. You can watch VideoCD, SVCD, DVD, 3ivx, DivX 3/4/5 and even WMV movies..
Cheers,
Paul.
Source: Paul Smedley