Thanks Mike! I had seen that clip before and for all you non-pickers out there, what those two are doing is STOOPID hard!!
In the 80's I was in a fair to middlin country-rock-bluegrassish band and one of the bits we did was, I'd pick up the bass, two other guys would play acoustic guitar and banjo, drummer would drum, and the female fiddler would, well, fiddle. We'd commence to play the theme to Deliverance and eventually I'd play one of those bass poppin R&B solos thru one progression while the boys would get situated with one's right hand playing rhythm guitar while his left was fretting the banjo. Now the others' R.H. was finger pickin the banjo, L.H. chording the guitar! This was about 1/20th the degree of difficulty of what that lady and gent was doing on that clip and it still took some thought and practice to figure it all out. Kinda like rubbin your head and pattin your tummy!
This would be the band of whom I speak. Me is upper right!
Ah! to be young again!