Put this clip first in your edit, then follow it with the FNAF Jumpscare Scream for the scare, and use the Inception Horn Sound Effect for a later reveal to keep the horror building in stages.
About this sound
This five-second mechanical cue signals the start of a night in Five Nights at Freddy's 3. Its cold, unsettling tone builds instant tension and leaves the listener nervous and uneasy, expecting danger to follow. It comes from Scott Cawthon's 2015 horror game, where it marks the move from the menu into a new shift.