Strange thing. Not even with QTAlternative installed, BSPlayer won't play the file. Instead MPC (some 2006 buld and Graphedit-2002 version)play the file with no problem. MPC uses it's internal decoders (unavailable) while GraphEdit uses LAV splitter and LAV decoder.
Why BSPlayer doesn't use LAV..that's a mistery
My guess...this format isn't supported anymore.