Distributor Licenses Documentary From Gravitas Ventures, DVD To Be Released On April 28, 2015 NEW YORK, April 15, 2015 /PRNewswire/ -- FilmRise has acquired U.S. DVD rights from Gravitas Ventures for the music documentary "Backstreet Boys: Show 'Em What You're Made Of," a revealing and exhilarating portrait of the biggest boy band of all time. The…