As the creator of Veritasium, a science education YouTube channel with 18 million subscribers, Derek Muller has spent the past 15 years exploring a counterintuitive vision for learning: Clarity numbs the mind, but confusion can crack it open. His audience has grown because of how he challenges common misconceptions about the laws of nature, and his rise has paralleled YouTube’s, whose creator-focused approach has made it the world’s largest streaming service by almost every measure—from content ...