Scantily-clad A.I.-generated avatars are stealing jokes from female comedians and retelling them to massive online audiences. Our critic Jason Zinoman examines this new social media phenomenon, why female comics are particularly vulnerable and what it means for the state of stand-up comedy. #socialmedia #comedytok Video by Jason Zinoman, Annie Harrigan, Sutton Raphael, Paige Money and Jon Miller/The New York Times