Place this clip as the reaction beat right after the setup line in your edit, not under dialogue. Follow it with a baby laughing meme for a younger crowd scene, or swap in a cat laugh meme when the second reaction needs a different character.
关于此声音
This is a short clip, about three seconds, of Yusuf Said laughing out loud in a natural, unforced burst. The laugh is clear and close, with the kind of rhythm that makes it hard not to smile along. It feels warm, silly and instantly contagious, turning a small funny moment into something everyone in the room shares.