Kevin Roose and Brian Stelter discuss Roose's newest story, "The Making of a YouTube Radical." Roose, a tech columnist at The New York Times, says YouTube's algorithm is "designed to create personalized rabbit holes," sometimes with dangerous consequences. Roose talks about how YouTube evolved into a "behavioral modification AI wrapped in the skin of a video website." And he discusses the positive and negative "garbage fire" reactions to his investigation.

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