Hi Peter. He's playing a Chalil, taught to him by an Israeli musician named Hillel in the late forties. He shows you how to make one in one of the Rainbow Quest videos. Very easy to make...exceptionately hard to play (there's no mouthpiece). They are used by both Palestinian and Israeli shepherds, and the repertoires of each are remarkably similar.
Songs on the Chalil that Pete has recorded several times are "She Moved Through The Fair", Rozinkes Mit Mandlen, Sally My Dear, and Schtille De Nacht.
He's a fine recorder player as well, having recorded with treble, baritone, tenor and alto.
I've learned a few of the Chalil tunes on Pennywhistle but they don't sound the same...not as subtle.