This short hehehe loop belongs to a long tradition of laugh tracks and reaction sounds shared across soundboards, messaging apps and short form video edits. With no clear single source, creators treat it as a generic cheeky laugh and reuse it wherever a character is meant to look smug, guilty or amused. Its tiny length makes it easy to layer, download and repost, so it keeps circulating in meme compilations and comment style videos even as longer laugh effects fall out of use.