The 'blacking up' is a tradition that goes back well before PC existed, I am told that groups of less well off people used to dance for money, to save being recognised they blacked their faces, the tradition continues with many Morris teams in the Midlands ' blacking up ' there is no racist intent.
The music is a bit basic a couple of accordions provide the base music with the sticks providing a beat as the contact the other members in some quite intricate sequences.