This ambience comes from Five Nights at Freddy's 2, the 2014 survival horror game by Scott Cawthon. The game's sound design became memorable for its constant tension, and ambient clips like this spread widely in horror edits, gaming memes and creepy short videos. People still use it because the audio is instantly recognizable to FNaF fans and effective even outside the game. A few seconds of this background noise can make almost any scene feel more uneasy, abandoned or dangerous.