This is not a documentary; it is a live performance by John Carpenter (on keyboard) of some of his brilliant film music, backed by an excellent band & visual from the films.
If you are a fan of his music this is a faultless show.
The show is available if you search youtube (but with a different date- by two years)
Here is the set-list-
00:00 Introduction
01:22 Escape from New York (Main Title)
04:45 Assault on Precinct 13 (Main Title)
09:29 Vortex (from Lost Themes)
14:09 Mystery (from Lost Themes)
18:40 The Fog (Main Title)
22:00 They Live (Coming to L. A.)
26:35 The Thing (Main Theme - Desolation) (Ennio Morricone cover)
31:20 Distant Dream (from Lost Themes II)
35:16 Big Trouble in Little China (Pork Chop Express)
39:13 Wraith (from Lost Themes II)
43:54 Night (Daniel Davies solo; from Lost Themes)
47:39 Halloween (Main Title)
51:50 In the Mouth of Madness (Main Title)
57:12 Prince of Darkness (Darkness Begins)
01:00:30 Virtual Survivor (from Lost Themes II)
01:04:29 Purgatory (from Lost Themes)
1:09:01 Christine: Christine Attacks (Plymouth Fury)