Place it right on the frame where the wrong name first appears, after a short Dramatic Dun Dun Dun build-up, then cut straight to a Vine Boom as the image lands. That order gives the reveal a setup, a shout and a heavy payoff without crowding the moment.
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This one-and-a-half-second clip is Vinesauce Joel shouting 'Grand Dad' in a loud, baffled Flintstones-parody voice, his voice jumping sharply on the second word. It feels frantic, silly and disbelieving, like catching a familiar name spelled wrong and blurting it out before you can stop yourself. It comes from Joel's incredulous reading of the misspelled 'Fleenstones' logo, which turned a bootleg cartoon parody into a lasting internet joke.