Hank, left, demonstrating the Nerdfighter gang sign, John on right.

The Vlogbrothers are John and Hank Green, who began corresponding through videos back in 2006 through a project called Brotherood 2.0, based on the premise that the two would only use textless communication for one year via new videos every weekday. Even though the project ended on December 31st, 2007, the brothers continued making videos a bit less frequently. And lo, this project fathered many other sub-projects, from Truth or Fail to the Project for Awesome to VidCon itself, and eventually the subculture of Nerdfighteria was born.