This is a filmed play. Second, his interpretation is a valid one and I didnt know there was a rule that actors could not play characters of different races. That kind of reverse racism is exactly what is to be avoided. Judge the acting for acting's sake. Olivier uses a full octave voice lower for the performance, unatural to his usual tenor voice. If one simply judges the acting, it should be seen as a powerful piece of work. Another performance of this is by Anthony Hopkins, also quite excellent, with different shadings.