The young woman singing in this clip appears to be the driving force behind the shoombabies YouTube channel. She sometimes performs solo, both with and without a guitar, but often is joined by a wide range of accompanying musicians.
In this case, the girl playing guitar isn’t identified and isn’t all that great a guitar player (or at least, her guitar doesn’t sound all that great to me… but maybe that’s more of a tuning issue). And I find that adds to the appeal of the clip.
Meet Me In Montauk 