Place it at the very end of an edit, after the last joke or scene has finished, so it acts as the closing line. Open the same video with Oi Meu Chapa for a matching Portuguese greeting, then let Law and Order Dun Dun hit just before it as the final sting.
Sobre este som
This 8.6-second clip is the Portuguese 'Boa noite' greeting from Jornal do Boris, spoken in a news-anchor voice. It feels formal and familiar, like the close of a nightly broadcast, and its polite, everyday wording makes it work as a gentle or ironic farewell. It comes from that Brazilian television programme.