The clip comes from a green screen style reaction recording where the speaker drags out oh my god into oh my gaaaaad, followed by a stunned wow. That format helped it spread as an overlay for other videos, since creators could place the reaction over any shocking scene. It became a reusable meme sound for TikTok edits, shorts and soundboards, valued less for who recorded it and more for how instantly readable the emotion is. The exaggerated delivery now signals amazement or disbelief even when used without the original video.