To see the hidden extra, you only have to run the credits to the end . You do not have to look at the credits, you just have to continue a few seconds after the end.
You will be rewarded with a 20-minute compilation of moments from question-and-answer sessions with Chappelle after a few of his shows. If you've seen sticks and stones, you know Chappelle does not talk about politics – unusual in the current climate. If you search for it, you will find some of them in the hidden section.
Sticks and Stones follows Chappelle's four 2017 Netflix Specials: The Age of Spinning, Deep in the Heart of Texas, Equanimity, and The Bird Revelation.