KSI (real name Olajide Olatunji) is truly a phenomenon. His YouTube channels have hits of more than a billion, and over 10M subscribers, making him the most watched individual online in the UK. If you know males aged 14-24, you know someone who has watched his videos, and he is ranked as one of the top 10 most popular people in the UK, with massive engagement for his comedy, football, gaming and music content.
KSI is a member of the online gaming group The Sidemen.
Just counting the days till I get my revenge...