In Jordan Peele’s highly-anticipated new horror film “Us,” Lupita Nyong’o plays both the hero and the monster. It’s a new genre for the 36-year-old actress who starred in last year’s cultural phenomenon “Black Panther” and won an Academy Award in 2014 for her performance in “12 Years a Slave.” In this week’s “Sunday Sitdown,” Willie Geist talks to Nyong’o about her journey from Kenya to Yale Drama School to the Oscars stage, and the whirlwind 6 years she’s had since then.