Here's why PewDiePie and other 'Let's Play' YouTube stars are so popular

Business InsiderHere's why PewDiePie and other 'Let's Play' YouTube stars are so popularBusiness InsiderWhen Dan Tibbets joined YouTube gaming giant Machinima as its chief content officer last September, he wasn't sure what to make of "Let's Play" videos. “I wanted to find out what the special thing was that makes so many millions of people watch them on ...and more »