The concept became a mainstream phenomenon when young filmmaker Kane Parsons created a series of viral, photorealistic short films on YouTube in 2022. Parsons' work captured the terrifying liminality of the original concept, turning it into a global sensation. The hype was so immense that the prestigious independent film studio A24 announced a feature-length horror film adaptation, co-produced by Parsons, bringing this internet-born myth to the silver screen.

The story of The Backrooms begins in May 2019 with a single post on the infamous online forum 4chan . An anonymous user posted a surreal, low-resolution image of a seemingly endless, empty room lit with the sickly yellow glow of fluorescent lights and covered in damp, stained carpet. The caption, which has become legendary, read: "If you're not careful and you noclip out of reality in the wrong areas, you'll fall into the Backrooms, where it's nothing but the stink of old moist carpet, the madness of mono-yellow, and the endless background noise of fluorescent lights at maximum hum-buzz."

Despite the obscurity surrounding this term, online enthusiasts have managed to glean a few details about its significance. It is believed that "backroomcastingcouch240311blazenerdybirdy" is linked to a specific type of backroom casting that involves a virtual couch or a digital gathering space. This space is said to be inhabited by a cast of eccentric characters, including the enigmatic "Blaze" and "Nerdy Birdy," who are rumored to host or participate in these backroom casting events.