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The site Nimbacreations.com says "they appeared in the film 'Inquisitor'.
WHERE CAN I SEE THIS MOVIE IF IT WAS EVER COMPLETED??????
THE FUTURE OF HUMANITY LIES IN MY PANTS
I did a quick google search on it and it seems it was a short film made by black library as a test reel for a movie, which never made it to production. It was released in limited quantities, a 1000 in total I think, to purchase at gamesday. I also am interested and seeing this video, so I hope this helps you out a little.
Xbox Gamertag: x Helbrecht x