The trailer, which features clips of ‘SNL’s’ most famous sketches, including “More Cowbell,” “Two Wild & Crazy Guys” and Chris Farley’s “Matt Foley/Van Down by the River,” teases the behind-the-scenes interviews with former and current “SNL” cast members like Amy Poehler, Will Ferrell, Tina Fey, Seth Meyers and Bowen Yang.