A pair of low-budget horror films created by young YouTube filmmakers drew large Gen Z audiences to theaters this weekend. It wasn't for the big...

“The Backrooms” is based on a viral short film series on YouTube that has amassed more than 220 million views.

“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.