This sound is most closely associated with the King emote and laugh from Clash Royale, the mobile game released by Supercell in 2016. Over time, players and meme editors pulled the laugh out of gameplay and started using it as a standalone reaction sound on short videos, gaming compilations and shitposts. Its staying power comes from how instantly recognizable it is and how clearly it signals teasing, sarcasm or smug satisfaction in just a couple of seconds, much like a bruh meme reaction.