The documentary shows clips from "Stargate: SG1" when talking about the advent of Crystal Skulls in popular culture, but the show misidentifies the series "Stargate: SG1" as "Stargate: Atlantis".
They reference the episode from Stargate Atlantis where Daniel Jackson finds the Crystal Skull from the Mayan Ruins, but it was Stargate SG-1 not Stargate Atlantis