Giannis Antetokounmpo documented his first day with the Heat in a YouTube video, Anthony Chiang of The Miami Herald writes in a subscriber-only story. I really do,” Antetokounmpo tells assistant coach Caron Butler, a former teammate in Milwaukee. “First of all, I’m doing it for me,” Antetokounmpo tells the coaches. I want to know everything, offense, defense. If I don’t know the offense, I cannot talk to my teammates.”