Way before cell phone cameras, we took selfies with Polaroids. Marques Brownlee explores how the first Polaroid camera, the Polaroid SX-70, turned us all into amateur photographers and paved the way for our social media-obsessed culture. Fellow YouTube creator and model Karlie Kloss teams up with Marques to make photo filters the retro way — with bleach. And Peter Mckinnon stops by to play “Dope or Nope.”