This is very cool, although their accents sometimes get in the way:
Somehow, I don't think that they're going to cover "Ceclia" though...
UPDATE: They are apparently well-known street musicians, called The Breslov Brothers, and have even covered....Pink Floyd!
They don't have to worry about Roger Waters dropping by to listen, though!
Also check out their Tears in Heaven.
(h/t Malca)