There is no widely documented public origin for this particular recording, so it is best understood as a user-uploaded reaction clip rather than a line from a known show or film. Short, single-word agreement sounds like this spread through soundboards and short-form video because they are easy to drop into almost any context without needing the original scene. A one-second yes works as shorthand for approval, excitement or reluctant agreement, which is why creators keep reusing it across memes, edits and reaction videos.