KSI featured in the British comedy film Laid in America (2016), and was the subject of KSI: Can't Lose (2018), a documentary film following the build-up to his first amateur boxing fight against British YouTuber Joe Weller. He has achieved fourteen top 40 singles on the UK Singles Chart, seven of them ending up in the Top 10 and five of them ending up in the Top 5. His second studio album, All Over The Place, debuted at number 1. KSI's 2020 debut studio album, Dissimulation, debuted at number 2 on the UK Albums Chart.
As of March 2021, he has over 34 million subscribers and over 8 billion video views across his two YouTube channels. His YouTube content has diversified to include vlog and comedy style videos. KSI registered his main YouTube account in 2009 and built a following posting gaming- commentary videos of the FIFA video game series. He is also the co-owner of Prime Hydration, XIX Vodka and a restaurant chain known as Sides.
He is a co-founder and member of the British YouTube group known as the Sidemen. Olajide Olayinka Williams ' JJ' Olatunji ( / ɒ l ə ˈ dʒ iː d eɪ ɒ l ə ˈ t u n dʒ iː/, oh-lah- JEE-day oh-lah- TUHN-jee born 19 June 1993), better known as KSI, is an English YouTuber and rapper.