Like many internet mysteries, its exact origin is difficult to pin down, but it follows a familiar pattern:

: The audio often utilizes binaural beats or infrasound —frequencies just below human hearing that can trigger physical feelings of anxiety or unease. 🕵️ Origins and Legend

: For fans of the "Backrooms" or "SCP Foundation," ISOULL.mp4 provides a quick hit of the eerie, "off-kilter" feeling they enjoy.