The slogan at the heart of the clip, workers of the world, unite, has been used in labour movements for over a century, which is part of why the shout feels recognisable to listeners who do not know Seu Armando. Online, searches tie the recording to Belford Roxo in Brazil, and it has circulated as a shareable sound for reaction videos, political edits and workplace jokes. Its appeal is that mix of earnest protest language and meme timing: a three-second rallying cry that can end a scene, underline a complaint or turn a work moment into a mock uprising.