Place it right after the mispronounced name in your edit, then follow with an oh no no no laugh to underline the reaction. Pair it before a shocked meme sound only when the conversation needs a second punch, keeping this clip as the first hit.
このサウンドについて
This is a very short voice clip built around a Brazilian Portuguese joke about pronouncing Slipknot, presented as the way a jerk would say the band name. It lasts under two seconds and lands as a quick, mocking imitation. The feeling is silly and teasing, like an inside joke among friends who know the name well.