For those who don't know, Chalkeaters, the guys who made this video, were actually pretty established and respected.
They were the ones who made the Todd Howard music video,
https://www.youtube.com/watch?v=YPN0qhSyWy8and collaborated with Valve itself to make the Count to Three video,
https://www.youtube.com/watch?v=jpw2ebhTSKshttps://www.youtube.com/watch?v=eDB_MXm3cEA