Cool Vibes has no single well-documented source, so it is best understood as part of the wider online habit of sharing short mood-setting clips on soundboards and social feeds. Short relaxed sounds like this travel easily because they fit many kinds of footage without needing context, a joke or a recognisable character. Creators reuse them as reusable background texture, often looping or fading them under talking, travel and lifestyle content. That flexibility is why a simple chilled clip can stay useful long after louder trend sounds fade.