Place it at the end of a thank-you moment, after the favour is shown and before the scene moves on, then follow it with a bell ding to close the beat. Keep it as the final spoken line in the sequence so the gratitude stays the focus.
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This short clip is a warm spoken Portuguese thank-you, 'valeu, amigo', delivered in a friendly, laid-back voice that sounds like it is meant for a close friend. It feels grateful and easygoing, turning a small favour into a light, affectionate moment rather than a formal thank-you.