The exact source of this clip is not documented, but its charm lies in the phrase itself: 'reg dich nicht auf' is an everyday German saying for telling someone to calm down. Online it circulates as a short voice meme, shared in German-language meme communities and soundboards where its dry delivery defuses overreactions. Similar German meme voice clips, like Kann es sein das du Dumm bist, use the same trick of mock-serious phrasing. Its staying power comes from universality — everyone knows someone who needs to hear it.