About the penalty
It is true that the ball was quick and maybe he didn't have time to react , but when giving a penalty it is also taken in consideration the arm placement . If the arm is in a natural position and the ball hits him quickly without time to react the penalty should not be given , if the arm is extended even if he can't pull it back on time you get a penalty . And from what i see his arm goes from his left to his front , the natural position in that case was on his left . There really is no reason for his hand to be in front of him (except from stoping the ball) . It should be a pen in 99.9% of cases