Place it just after the reveal in a short edit, then follow it with Nelson's Ha-Ha! once the joke has landed. For a slower build, open with Sudden Suspense, let the reveal land, and use this clip as the payoff before cutting to the reaction.
このサウンドについて
This clip is a short, under-two-second human giggle that spells out its own name, a soft meheheh delivered with a sly, rising lilt. It feels mischievous and smug without turning mean, like someone quietly pleased with a joke only they have spotted. The laugh stays light and teasing, making it easy to read as playful scheming rather than open mockery.