Put it at the very start of an edit as the opening greeting, before any introduction or title card appears. Follow it with a bell ding to mark the start of the main content, then let the next clip carry the scene without another greeting.
O tym dźwięku
This is a very short Portuguese welcome greeting, lasting under half a second, delivered as a spoken 'Seja bem-vindos'. It feels warm, friendly and instantly inviting, like opening a door for guests who have just arrived. The quick, cheerful delivery makes it easy to recognise and hard to mistake for anything else.