The name links this clip to Trivia Crack, the mobile trivia game built around quiz questions and head-to-head challenges, although the exact recording behind this short 'oooo' is not documented. On soundboards it circulates as a compact reaction sound rather than a piece of game music, which is why creators reach for it in quiz and game videos. Its appeal is practical: at just over two seconds it fits a reveal, a pause or a punchline without slowing an edit, and the familiar quiz-game association makes the reaction read instantly to viewers who have played similar trivia apps.