“I’ve gone back and forth on this decision for a very long time,” he added. “I’ve spent months trying to figure out what the right thing to do is.
“But after a lot of thought, I’ve decided that I will no longer be doing Sidemen videos. Today, 31 May, will be my final Sidemen video.”
KSI, who appeared in Saturday’s final of ITV’s Britain’s Got Talent, said he remembered the group’s early days, and that he had “no idea that tens of millions of people were going to be watching us on the channel”.
“Together we’ve done things I never thought were possible,” he added.
He went on to thank each of the group’s other members Simon Minter, Josh Bradley, Vikram Barn, Tobi Brown, Ethan Payne and Harry Lewis, saying they “deserve somebody who can give 100%”.
The collective have more than 140 million YouTube subscribers between them and have hosted charity football matches that have raised millions of pounds for charity.
KSI started making videos in 2008 and rose to fame as an online streamer. He has more than 18m subscribers to his personal YouTube channel.
He is also a musician, former boxer and recently bought a minority stake in Dagenham & Redbridge Football Club.