After blockbuster hits like “Jumanji,” “Ride Along,” and "Central Intelligence," Kevin Hart has become one of the world’s biggest comedians, living in the rarified air of his own comedy heroes. In this week’s “Sunday Sitdown” Willie Geist met up with Hart at Madison Square Garden on his “Irresponsible Tour” to talk about growing up in the Philadelphia stand-up circuit, his confessional style of humor, and how he became the king of his own media empire.