I really like this animation, it's simple, and for me is very deep too. I love Pink Floyd and even don't having "lyrics" this song, The great gig in the sky, is one of my favorite. Was a perfect combination between the song and the very known painting, The Scream of Nature by Edvard Munch, because always when I see a painting I try to understand the history behind it, and in my perception suited well.
I like the song and also the animation. It's simple because the characters don't move, so the animation is, basically, the change between scenarios and drawings, and sometimes they made use of the same drawing and effects.