Back in 2012 Capcom did a teaser trailer for a planned darkstalkers project that never truly made the cut. However the trailer has never been fully shown in full quality.
If I had to guess on more information regarding who made the trailer. It was likely Polygon Pictures, the company that had been making trailers for many of their games at the time.
This is likely a fruitless search but it's something thats bothered me for over a decade at this point, about a trailer a company never officially posted themselves.