Place it near the end of a short meme edit, after the setup has landed, then follow it with Nico Nico Nii to complete the running gag before cutting to the reaction shot.
关于此声音
This 13-second clip is a rapid run of short 'nii' vocal bursts, repeated again and again until the pattern itself becomes the joke. It feels bright, silly and deliberately over the top, like someone leaning into a catchphrase far past the point of reason. The repetition builds a playful, teasing energy that works best when the listener already knows the sound and is waiting for one more 'nii'.