Every year, Youtube posts a video about all the iconic things that happened on youtube that year. They call it "Youtube Rewind". Turn down for 2014 was the video for that year. It contains famous YouTubers such as Pewdiepie, Connor Franta, Smosh, Jenna Marbles, etc.
Did You Know?
They had to film in different countries, including USA, England, Japan etc. See more
References Sesame Street