The notion of the Magical Mystery Tour came from a circle and a dot sketch drawn by Paul, and flowered by all of them. Paul, as the germinating artist, provides here the context of the Beatles at that moment in time and reflections of this underground film.

I'm not sure the commentary adds much that the other supplemental features cover. And for a film that really had no plan or master direction, McCartney really can only give so much of a planned or directed commentary. Much of it is "and so we went there because we liked it and this dialog is improvised and since it had nothing to do with the next bit we connected it with a bit of narration and I had a camera that I liked so we used it and we liked this actor so we brought him on"

I mean, hey, it's Sir Paul McCartney (sounding a little old and tired) discussing some of his work with the Beatles, so if you love the Beatles, it's worth a listen. If you're hoping for some kind of master class in filmmaking, then you'll be disappointed.