I MUST identify this song!
 

So, there's a video on YouTube , which is a music video (lesser known) that shows an animated girl using a music box. The music starts off slowly, then gets more complex as the scene expands and zooms out, showing a hill, tree and bird.

Also by the same artist there is a song called something similar to 'A day on the moon', which shows some astronauts going to the moon.

This is driving me crazy.

Sounds like a video thats reallt old called "When you're Gone" by ELO. It was from that silly movie "Xanadu" with Olivia Newton-John.