I did a search on the MusicK8 archives and found some really awesome videos on there that I have used in the classroom- a couple of my recent favorites that students REALLY loved watching- this one is the Hallelujah Chorus
Bach's Toccatta & Fugue (by the same animator)
Another thing my third graders loved watching was a clip on youtube by the Discovery Channel's "How It's Made" program.
Enjoy! PLEASE leave a comment or two- wondering if anybody is actually reading this???