Wonka bars and ghost kitchens: How food became the next frontier for YouTubers

In a YouTube video posted earlier this year, Logan Paul stands perplexed in the beverage aisle of a Walmart. "Help me understand, honestly," says the YouTuber-turned-boxer, pointing to the shelves where Prime, a sports drink he launched in January with former rival KSI, is sandwiched between bottles of Gatorade and Powerade. "We...