openmw.org

Chris wrote: It seems the good folks over at the FFmpeg project have managed to add support Bink audio+video earlier this year. FFmpeg is able to play Morrowind's video files (tested through mplayer).

Not sure if you'd want to use FFmpeg directly, or play through GStreamer once its ffmpeg plugin is updated for it. It's still a ways off probably anyway, but I thought to give a heads-up.