Put it in the middle of a reaction chain, right after the Ceeday huh lands and before an eww brother eww response. That order lets the cough interrupt the confusion, then the disgust closes the scene without needing another beat afterwards.
关于此声音
This is a one-second clip of Bluudude coughing, sped up so the coughs pile up fast and sound frantic. It feels funny and a little awkward, turning an ordinary cough into a panicked, over-the-top reaction that lands as a quick gag rather than anything serious.