celtic woman is a pop version of traditional stuff.

It's also glitzy and more about presentation than about the songs themselves. A sanitised version of traditional stuff is more like it.

this guy does the equivalent for taos natives.

It's also glitzy and highly commercialised and - I suspect - also sanitised. I don't know enough about his culture to say for certain, but the style of presentation suggests it.

In both cases it's "folk" aimed at a mass market where presentation triumphs over content