GWEN IFILL: We end with another look at Brief But Spectacular, our series of interviews featuring personal insights from artists, authors, leaders, and thinkers, telling us, briefly, what they are passionate about.

Today, producer Steve Goldbloom hears from the creators of the comedy central hit show "Broad City."

Abbi Jacobson and Ilana Glazer, explain how YouTube and the improvisational group Upright Citizens Brigade shaped their success.