“Backrooms,” a psychological horror flick opening this weekend, is part of a wave of breakout films from fledgling directors who honed their instincts on YouTube.“Backrooms,” a psychological horror flick opening this weekend, is part of a wave of breakout films from fledgling directors who honed their instincts on YouTube. Movies, Box Office Sales, YouTube.com, A24 Films LLC, Barker, Curry, Fischbach, Mark (Markiplier), Parsons, Kane Read More