Today we talk with one of the most successful couples on YouTube. Matthew Patrick, also known as MatPat, is best known as the creator and narrator of the YouTube channels The Game Theorists, The Film Theorists and YouTube’s largest live-streaming channel, GTLive, which he co-hosts with his wife and fellow YouTube star Stephanie Patrick. Their channels are currently at 20 million subscribers and 60 million monthly views. Matthew and Stephanie, who manages the business side of their partnership, are co-owners of Theorist Media, where they use data-based methods to accelerate the growth of social media audiences, particularly on YouTube.