ONEDOOR, Hands up🙌

In the Korean comments

One comment turns the title into a Jaehyun-specific chant: “재현핸섭” (Jaehyun-haenseop, “Jaehyun, hands up”). Another notices a recurring detail beyond this clip, reading in translation, “These days, he looks happy whenever he dances, and that makes me feel good too.”

What the words mean

환장하다 (hwanjanghada, literally “to go mad”) appears in a comment saying Jaehyun knows exactly what makes ONEDOOR “go mad.” Here it means “go wild for” or “be crazy about,” used as casual, admiring exaggeration rather than genuine distress.