He is not folding the Nakamura lock, as far as my googling goes. The nakamura lock starts with a perfect 90 degrees tip (two 45 degree folds), whereas OP starts

He is not folding the Nakamura lock, as far as my googling goes. The nakamura lock starts with a perfect 90 degrees tip (two 45 degree folds), whereas OP starts with two 22.5 degree folds that don't form a a tip).