Sidemen is a YouTube channel that has over 21 Million subscribers. They are based in England, United Kingdom.
Guinness World Record
JackSucksAtLife gave each of the Sidemen (Except KSI) a Guinness World Record for The Most Viewed Sporting Live Stream On YouTube. Vikstar123 got a To Be Fair Though award, which was see-through. W2S was awarded a separate Most Viewed Crossbar Challenge World Record as well.
KSI was training for his next boxing match at the time, so he wasn't given an award.