This clip is best understood as a generic celebratory reaction sound rather than a quote with a clearly verified source. Very short cheers like “yey” spread widely through meme edits, mobile videos, and reaction posts because they communicate success in less than a second. Its staying power comes from that speed: it is easy to drop after a joke, a lucky moment, or a wholesome reveal. It fills a similar role to YAAAAAAAAY, but in a shorter, softer form that suits quick comedic timing.