YouTube a conspiracy ecosystem: Craig Timberg and Drew Harwell write about wild conspiracies that flood YouTube.

“Among the most popular genres in the collection were related to mass shootings, and especially the one in Las Vegas in October that killed 58 people,” they write. “Typically these portrayed the attacks as politically motivated hoaxes, so called ‘false flags’ intended to dupe the public into believing that gun rights needed to be curtailed.” The 50 most widely viewed mass-shooting conspiracy videos were viewed 50 million times.