I spent a few weeks as an exchange student in Quebec, Quebec in ‘73. I saw the movie La Valle’ (The Valley, did I spell that right?) at a theater. Obscured By Clouds is the soundtrack to it. Amazing that it came out just before Dark Side of the Moon and never really got noticed, except by you of course.
Saw La Valle in ‘77 (I think? in Northern CA) in my, um, wilder days :)
I saw a bootleg video of the movie at a card show a few years ago... apparently it is only available in Europe? I remember I was surprised at the rating (X maybe?).