That’s not tapping, that’s a specific folk form of irish step dance that where I’m from (newfoundland) is called Stepping, and there’s a long-standing celtic and acadian (possibly cajun?) tradition of using stepping as percussion to folk music. People will put down boards to boost the sound, and then go for it during a jig. I’ve seen people play the jig on the fiddle and step at the same time, it is absolutely mind-blowing.