Place it just after the visible reaction in your edit, once everyone on screen has already responded, then follow it with SpongeBob Sad Song to carry the scene a little further. Keep it as the single spoken cue in that section, and let the music that follows do the rest of the work.
关于此声音
This short spoken clip, just over four seconds long, delivers a single plain observation that a friend is having a feeling, spoken in a calm, matter-of-fact tone. It lands as funny and awkward at once, turning an ordinary emotional moment into something everyone in the room can notice. The gentle understatement makes the sentiment feel both sincere and slightly uncomfortable, which is why it works as a warm, teasing reaction.