There is no widely documented original source for this particular eh eh eh clip, which appears to come from user-generated soundboard uploads rather than a named film, show or song. Its appeal is in its simplicity: the repeated syllable is instantly recognisable as a teasing, uncertain response, so it travels easily between short videos, reaction edits and chat memes without needing context. Because it is short and loop-friendly, creators keep reusing it as a lightweight way to signal doubt, mock surprise or soften an awkward moment.