Last week countless YouTube stars, their fans and executives from the entertainment and ad businesses descended on Anaheim, Calif., for VidCon, the online video industry's annual gathering. Many came to see their favorite YouTube creators in person, but they also showed what the industry that's grown up around YouTube actually looks like when it's away from the computer. Online video networks executives George Strompolos and Keith Richman, ad agency CEO Dimitry Ioffe and a trio of teens told Ad Age what they saw.