Place it at the very end of a FNAF edit, after the tension peaks, so it acts as the payoff for surviving the night. Put FNAF Jumpscare Scream just before it to heighten the scare, then let this clip close the scene and hand the win to the viewer.
About this sound
This is a short, roughly 1.4-second 'yay' cheer linked to Five Nights at Freddy's, delivered as a bright, single vocal burst without saturation. It feels instantly celebratory and light, like a small win after a tense moment, and works as a quick burst of relief rather than a long celebration.