The new video, "Kung Fu Piano: Cello Ascends," shows pianist Jon Schmidt and cellist Steven Sharp Nelson playing on the actual Great Wall of China.
The song is an arrangement (by the group's percussionist, Al Van Der Beek) of a track from the "Kung Fu Panda" score, "Oogway Ascends," with a few licks of Frederick Chopin's Prelude Op. 28 No. 20 in C minor.
(If you're not up on your classical music, it's the same passage of Chopin that Barry Manilow used in his 1975 hit "Could It Be Magic?")