I've then figured out that there was a link to a website, talking about a place called "The Backrooms" and explaining all of the "Levels" of the Backrooms. I've honestly clicked the first Level on this website, and then it hit my head, it was explaining a level from the footage. Hit space to see the two pages.
This project/video is just an ARG, it is not real, and any comments saying it is real will be deleted for false speech.
