Hmm, could be called Quicklook... open Finder, select your file and press Space, this should open a preview of the file.
This should use the base OSX capabilities. Quicktime has it's own plugins, and Resolume is not using Quicktime any more to play files.
If it plays, I'd guess Resolume and Alley should be able to play it too. Please send us a sample file with this codec to email@example.com
and we can then check it out.