Mahershala Ali has worked for 20 years, earning Oscars for \u201cMoonlight\u201d and \u201cGreen Book.\u201d But the new drama \u201cSwan Song\u201d is his first leading film role. He\u2019s also a producer on the project, which came naturally since he feels he\u2019s been doing some of that work \u2014 without the credit \u2014 for years. Ali tells us why \u201cSwan Song\u201d was the right film for him to take on a role behind the camera too.