I don’t care that the YouTube video says “ft. Kate Bush”. It’s a duet–plain and simple.
Peter Gabriel sings the depressing parts and Kate Bush sings the uplifting parts. The music video reflects that beautifully. When it’s his turn, then they spin to reveal Gabriel. When it’s her turn, then they spin to reveal Bush. This goes on while the moon crosses the sun to reach eclipse at the mid-point of the song. It was done in a single take. Nice and simple for what is a no-frills song.
That’s it! I am not sure why they felt the need to film another music video for this song, but they did. Maybe they felt people wouldn’t listen to the lyrics and just focus on Gabriel and Bush in a six-and-a-half minute embrace.