Place it straight after the complaint in your edit, so it answers the first reaction rather than starting the scene. Follow it with a laugh or a groan from the same group, keeping that shared exchange together before you cut to the next moment.
이 사운드에 대해
This is a very short spoken reaction clip, lasting just over a second, centred on the German phrase 'auch sauer'. It carries a grumpy, slightly sour tone, like someone joining in with a complaint instead of arguing against it. The feeling is playful annoyance, a quick shared eye-roll for moments when everyone is fed up together.