No guarantees, but they look like these: http://www.knowles.com/search/family.do?family_id=CM&x_sub_cat_id=10
Probably not. Those are more for headset / voice application and generally suck for music, not to mention they are too big (that case only fit dynamic driver up to 1cm). The only BA that is rounded and small enough to fit in those casing should be Siren, but the bass driver in the youtube video looks bigger than a Siren. It would be very interesting to know how they manage to stack two BA in an inline configuration.,