Nikkolas Smith, concept artist for the film "Sinners," joins to talk about the movie's multiple Oscar nominations, blending art and activism and his new children's book, "A Change is Gonna Come." Subscribe to ABC News on YouTube: https://abcnews.visitlink.me/59aJ1G Watch 24/7 coverage of breaking news and live events on ABC News Live: https://www.youtube.com/watch?v=gN0PZCe-kwQ&ab_channel=ABCNews Watch full episodes of World News Tonight with David Muir here: https://youtube.com/playlist?list=