"Van Morrison - Another Glorious Decade. Under Review 1977-1987" - Almost 2-hour long documentary film and extras coming soon on DVD. Available now as pre-release at www.ChromeDreams.co.uk and on Amazon.com from 15/09/2015.
I think the incidental music in this documentary is not Van original music, but rather Van-style instrumental tracks recorded by musicians hired for the documentary. If it doesn't have a caption crediting Van, then he didn't do that track.