The sound comes from The Legend of Zelda: Breath of the Wild, released in 2017, where Koroks hide across Hyrule waiting to be discovered. Each time Link uncovers one by lifting rocks, solving puzzles or spotting odd patterns, the Korok rewards him with its signature Ya Haha laugh and a Korok Seed. Clips of that moment spread through gaming videos, streams and edits, and the laugh became shorthand online for finding something hidden. It stays popular because almost any small discovery can be framed as a Korok moment.