https://www.rollingstone.com/movies/...ue-doc-844268/
Excerpt from this article :
"Nobody in Dylan’s team even knew exactly what was on the work print. When they went through it, they were thrilled to discover amazing scenes like Dylan and Joni Mitchell playing her song “Coyote” at Gordon Lightfoot’s apartment"
Unfortunately, I don't believe Gordon is featured in this film. I don't see his name listed but hopefully I'm mistaken!