Place it just after the punchline in an edit, then follow it with a baby laughing meme when the reaction should grow, or swap in a cat laugh meme instead when the joke is sillier and needs a stranger payoff.
About this sound
This clip is a short, just-under-two-second burst of giggling, repeating a light khi-khi-khi-kha pattern in a bright, human voice. It feels mischievous and teasing, like someone trying not to laugh and failing, which makes it land as a playful reaction rather than a full laugh. It works best as a quick, knowing chuckle after a joke or an awkward moment.