No source work, character, performer or year is documented for this clip, so its origin should not be assumed from the name Jasper alone. It circulates online as a short, user-generated reaction sound, filed under memes and reactions, where the stretched oh yeah is reused on its own rather than as part of a longer scene. Its use online comes from that simplicity: the name is easy to remember, the sound is easy to place, and the long yeah gives a brief, recognizable lift to cute moments shared in short videos.