Jack Campins comment about the string drum, the tambourin de Béarn is correct, as it is the other instrument played with the Tabor pipes by the same musician.

The drum is actually a box with strings strung down the face and tuned to the 1, 4, 5 and 7 of the key of the tabor pipe. The stings are hit with a stick while the "Drum" hangs down the front of the player and his other hand is playing the tabor pipe. The effect is not unlike a drone while the tabor plays the treble portion of the French street music.

My neighbor, Nick Blanton, who builds Hammered Dulcimers, built one which can be seen on the Home page of http://smad.us/ or google "Shepherdstown Music and Dance". You'll note the two horns at the top which serve no purpose except to protect the friction tuning pegs.