ANSWER:

You don’t need to convince him as he is not your mother! 

Leave him alone and follow the sunnah.

QUESTION: I have always been praying the hanafi method which does not involve the rafaideen I have started praying my namaz according to the sunnah (as shown in your video ) But my brother objects to me doing the rafaideen I tried convincing him that it’s the sunnah but he won’t listen