A man was arrested yesterday for allegedly filming up a woman's skirt with a hidden video camera. The 34-year-old reportedly followed a woman, 20, and placed a paper bag containing the camera under her skirt while she was waiting for a lift in the lobby of Kin Yip Plaza in Cheung Yee Street, Cheung Sha Wan. He fled when the woman noticed and shouted for help. After a brief chase, he was subdued by a male pedestrian and delivered to police. Last night he was arrested for loitering and was being questioned by police officers.