Saw this on i09, but the Vimeo post seems to have been taken down. Hopefully the Youtube version will stay up for a bit longer.
From the YouTube description:
One of the Blade Runner Convention Reels featuring interviews with Ridley Scott, Syd Mead and Douglas Trumbull about making Blade Runner universe. This 16 mm featurette, made by M. K. Productions in 1982, is specifically designed to circulate through the country’s various horror, fantasy and science fiction conventions.
A nice look back at a great film.