Place it at the very end of a bedtime sequence, after a calm lullaby-style track and a short good-night voice line, so the closing line lands as the final beat.
關於此聲音
This short Bluey clip sings the final line of a bedtime counting rhyme, with a small childlike voice saying good night after the last one is left in the bed. It feels warm, sleepy and gently playful, like the quiet end of a story before lights out. Taken from the Australian children's series Bluey, it suits calm bedtime moments rather than loud jokes.