“With Hasan in Gaza” is composed of MiniDV camcorder footage that the Palestinian filmmaker Kamal Aljafari took in Gaza over two days in 2001, when outsiders were still able to visit. With little to go on, Aljafari was looking for his friend Abdel, whom he knew from the months he had spent in an Israeli prison in 1989 and ’90, during the first Palestinian intifada, or uprising. He was traveling with a guide named Hasan Elboubou. Aljafari, who takes a “conceived by” credit instead of listing