A former student of a well-known Hong Kong basketball coach, seen in a video slapping a young player, has defended his disciplinary approach as acceptable despite legal experts warning the conduct could constitute common assault. Veteran coach Yung Kam-wah apologised on Tuesday over the incident two years ago, after the video recently went viral and sparked public concern. In the clip, Yung first takes a jacket from the boy’s hand and throws it to the ground, then grabs the student’s left hand..