Put it first in your edit as the opening greeting, before any dialogue or action starts. Follow it straight away with clapping to sell the entrance, then cut to the person reacting. If the greeting falls flat, use Bruh right after it to turn the moment into a joke.
关于此声音
This is a roughly ten-second spoken greeting, a single voice stretching the Portuguese word for hello into a long, rising olaaan. It feels loud, playful and deliberately over-the-top, like a grand entrance hello meant to get a laugh. The stretched vowel carries the whole greeting, turning a simple hello into a moment people notice.