DESCRIPTION:
Aquarium, from Camille Saint-Saëns' Carnival of the Animals, performed by the Seattle Youth Symphony, with a graphical score.
FAQ

Q: Who is performing?
A: The performance is by the Seattle Youth Symphony, conducted by Vilem Sokol.

Q: Where can I get this recording?
A: At IMSLP:
http://tinyurl.com/IMSLP-SS-Carnival

Q: What are the instruments?
A: The rhombi at the top are glockenspiel; the yellow ellipses are flute; the circles are strings, and the bars are piano.

Q: How did you make this?
A: With software I wrote. There something similar for Windows you can get here:
http://www.musanim.com/player/
Some people have used this software to make videos for YouTube:
http://www.musanim.com/all/MAMMIDIPlayerOnYouTube.html
I haven't (since I have my own version that I prefer), but here's how they did it:
http://www.musanim.com/youtube/HowToMakeMamVideos.html

Q: What would it look like with a black background instead?
A: It would look like this:
http://www.youtube.com/watch?v=AfxpFrOCQSs

Q: I've heard this before; what movies is it in?
A: According to viewers (I haven't verified this), the following movies either use this piece or have music that is based on it: Beauty and the Beast (Disney), Only You (1994), The Godfather Part II, Babe (1995), Charlotte's Web (2006), The Curious Case of Benjamin Button (2008), Vampire The Masquerade: Bloodlines. It is said to have been in a Nancy Drew game.

Q: Can you please do a video of ______?
A: Please read this:
http://www.musanim.com/requests/

My thanks to Kazuto Byars for suggesting I do an animation of this piece and finding an audio recording that I had permission to use.