The exact origin of this clip is not documented, but the Spanish wording and voice-note style have made it circulate as a shareable WhatsApp style audio. The phrase vieja hace 15 dias is passed around as shorthand for calling something stale, and the short runtime makes it easy to forward, save to a soundboard, and reuse in chats and edits. It stays popular because the joke does not depend on a specific show or celebrity, so any late screenshot, repeated story, or old trend can become the setup for the same quick reaction from friends online.