Place it at the very end of a short edit, after the favour or gift is shown, so it closes the moment. Put a correct ding just before it to mark the good deed, then follow it with a ba dum tss only when you want the thanks to turn comic.
Sobre este sonido
This clip is a short spoken Portuguese phrase, 'Eu agradeço a você,' meaning 'I thank you,' lasting about a second and a half. Its measured, courteous delivery makes the gratitude feel formal and sincere, with a gentle warmth that softens the formality. Used on its own, it can also feel politely deadpan, turning a routine thank-you into a small, knowing moment.