É então is a common Portuguese expression that works like so then or and so in English, which explains why this short clip travels easily even outside full conversations. No clear original source is attached to this version, so its life is mainly online as a reusable reaction and transition sound. People share it on soundboards and in chat groups, drop it into short videos for timing, and reuse the stretched delivery to signal hesitation, agreement, or a change of subject without needing extra explanation.