Short outro-style sounds like this circulate mainly among K-pop fan editors, who use brief closing stings to give edits a finished, broadcast-like feel without borrowing a full song. The Hearts2Hearts tag connects it to fans of the SM Entertainment girl group, whose bright, youthful style suits clean endings for dance covers, lyric videos and compilation edits. Because the clip is only a few seconds long, it is easy to drop at the end of short-form videos, and that flexibility is why similar outro clips keep appearing in fan-made content.