He didn't write anything about hospital or cinema.
Piennes is a commune in the Meurthe-et-Moselle department in north-eastern France, about 40 km northeast of Verdun. The cinema was used by German army, later it was a hospital during the war. I don't know if it was used as a cinema before and after the war. The building is still standing (look at this interesting website www.morthomme.com.)
Today there is still a cinema in Piennes, but not in the shown building.