The gear requirement in favor of SS was adopted last year by the UCI. You can now compete in UCI in SS. But that bike is TRA's and he doesn't compete. Though he has probably the skills to belong to the top riders, he prefers to make videos.
This is quite confusing to classify because that bike is a 26"- mod meaning it has a116 mm spacing , the frame is prolly available in 135mm spacing too called a 26" - stock.
But its still a stock bike simply because its a 26" bike.