_Backrooms_ and _Obsession_, two YouTuber-directed low-budget horror films, topped the box office, with _Backrooms_ earning $81.45 million domestically this weekend.

“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.

YouTube filmmakers are ascendant, with 'Obsession' topping the second weekend of 'Mandalorian and Grogu' and becoming the first film in more than 40 years to increase in both its…