The phrase is everyday Spanish, combining alegría for joy with alboroto for a noisy fuss or commotion, which explains why the clip works even for listeners who catch only the tone. Online it circulates as a compact reaction sound rather than a song or dialogue excerpt, shared in short videos and message threads where someone needs instant celebration. Its appeal is the contrast between the tiny runtime and the huge emotion, so a normal piece of news can be framed as a full party moment.