The playing is excellent. I'm really impressed with the video, though, it's very well done and fairly slick.
Wow! If that's the traditional way to play the washboard (rubber gloves and metal finger picks) I did not know and I'm glad I do now.
The rubber gloves protect you from harsh detergents.
Just googled "washboard gloves", and they are a thing. But hers are much nicer than most.
"She plays the washboard using golf gloves to which thimbles have been attached. Her aggressive playing style results in the band selling fragments of broken and burnt washboard at the merchandise table at their concerts."
I wish I had time to be a super fan.