Two good videos. The first is about sax embouchure, the second is about harmonica playing. As a RockSax player/enthusiast I learn more from a blues harmonica player than I do from a classical or jazz saxophonist. I can't play the high tones without firm lips and snake eyed. Try to play with a little more fishmouth and happy/surprised eyes.
Jamie Anderson
View: https://youtu.be/nmyJNHRFLks?feature=shared
Big Walker
View: https://youtu.be/XPh4-UAm4rg?feature=shared
Jamie Anderson
Big Walker