X7 Updates on Instagram: "Olajide Olayinka Williams Olatunji, known as KSI, is a British YouTuber, musician, and professional boxer born on June 19, 1993, in London, England. He launched his YouTube channel in 2009, initially gaining fame through FIFA gameplay videos and comedic commentary, which resonated with a global audience, leading to over 24 million subscribers and billions of views by 2025. As a co-founder of the Sidemen, a group of seven British YouTubers, KSI contributes to collaborati