Place it immediately after the reveal in a reaction edit, letting the setup clip finish first, then follow it with Eww Brother Eww for a second reaction or Oh My God Wow when the moment turns to shock.
Über diesen Sound
Guhhh is a brief vocal groan lasting about a second and a half, delivered as a single drawn-out grunt with no other words or effects. It lands as awkward, exasperated and a little disgusted, the kind of noise you make when something is gross, cringe or just too much to answer properly.