"La Nuit de Possession" -- Gnawa

Very good documentary on a lila, or ritual of possession, of the Gnawa. This is filmed in Essaouira (where I spent part of summer 1999), and features the late, great Gnawa master, M'allim Mahmoud Guinea (1951-2015), and his wife Malika, a shuwwafa (clairvoyant), who is in charge of the ceremony. Directed by Frank Cassenti (2011).

You can find a number of great Mahmoud Guinea recordings at Moroccan Tape Stash.