The stills are from a 47 minute clip that was once on Youtube but seems to be gone. I made a note that it was called "Explanation - Yukihiro Takahashi part 1", which was probably stated on the Youtube page but don't take this as a certainty.
It consists of excerpts from various YMO live concerts with one person talking over them in Japanese the whole time. The voice sounds more like a dvd commentary than a documentary narrator. The point is seems to be the narration rather than than showing you entire live songs start to finish. Also there are a few very short documentary-type clips interspersed.
