In this latest episode of Vsauce, YouTube's certified explainer Michael Stevens sheds a light on the little-known and curious subculture of number-counting on YouTube, including the works of Mike Smith, Jeremy Harper and John Harchick, as well as what happens to our brains when we count.

The newly released trailer for the upcoming live-action film Jem and the Holograms has been poorly received online, with many criticizing the film for removing key plot points from the original animated television series.

Chris Gethard, a New York City-based comedian, found one of his trolls, brought him to a studio, and filmed their awkward conversation. The result is an interesting look at why one person decided to be mean to someone he'd never even met.

This practice of re-hosting online media without the creator's permission has seen a substantial increase since Facebook gave users the ability to upload videos, many of which have been ripped off YouTube without attribution.