Rachel Brosnahan, Tony Shalhoub give sneak peek of season 4 of 'Marvelous Mrs. Maisel'

Rachel Brosnahan and Tony Shalhoub reflect on what made the show "The Marvelous Mrs. Maisel" a success. They talk to Hoda Kotb about the magic they feel on set, and also look ahead to the fourth season which premieres in February.