Personal Life:Fabss was born and raised in England, where he continues to live and produce content that resonates with a global audience. His personal background and locality often flavor his content, making it relatable to a diverse audience beyond his native country.

He registered his current YouTube account on 24 July 2009 under the name KSI Olajide BT, where he uploaded gaming–commentary videos of the FIFA video game series from his bedroom at his parents' house in Watford. "KSI" stands for Knowledge Strength Integrity, which was taken from a Halo clan.

YouTube's annual Brandcast event is notable in that it doesn't just simply tell the audience what it should know about the platform for the coming year, Spark Foundry Australia national head of investment Sue-Ellen Osborn said. "It is an immersive event that entertains, educates and takes us on a cultural journey.

Radzinskaya's content includes, among other things, children's songs, educational entertainment, unboxings, vlogging, and roleplays. Her channels are dubbed into English, German, Arabic, Bangla, French, Portuguese, Hindi, Turkish, Spanish, Korean, Vietnamese, and Indonesian.