This clip is mainly used online as a Spanish-language disbelief reaction rather than for a widely documented source title. Short reaction audios like this spread through meme edits, reposted videos and chat forwards because they communicate a feeling instantly. Its stretched delivery makes it more memorable than a plain "no creo," so people keep using it when a video needs a quick sarcastic or skeptical beat. The sound stays popular because it is brief, easy to place over any reveal and readable even without context.