The exact origin of this extended hehehe laugh is not documented in the clip itself, so it is best treated as a generic reaction laugh rather than a line from a known character or show. Online, long taunting laughs like this have become a staple of meme edits, gaming montages and reaction videos, where the sound alone can signal mockery, scheming or playful menace. Its length makes it especially useful for creators, because it can cover a full reaction shot without needing to be looped. That flexibility is why it keeps appearing in short-form edits.