Place this clip as the complaint itself, right after the visual cause in your edit, then follow it with the Eww Brother Eww button from a friend reacting to all that scratching on screen.
About this sound
This is a short Dutch voice clip, about two and a half seconds long, of someone dramatically declaring 'ik heb ontzettende jeuk' - I have a terrible itch. The delivery turns a tiny, everyday annoyance into a big complaint, which makes it feel funny, exaggerated and instantly relatable for anyone who has been bitten or irritated.