From Felix to PewDiePie

Who is PewDiePie and how did he become the most popular star on YouTube? Yahoo Global News Anchor Katie Couric sat down with 26-year-old Felix Kjellberg to find how he went from a college student in Sweden to a YouTube phenomenon who provides funny commentary on video games and vlogs his latest adventures. He has built the biggest fan base on YouTube with over 40 million subscribers and his videos have been viewed over 10 billion times.