This especially caught my attention, because I'm currently working on memorizing Mozart 2 for a performance at the end of the month with the Western Carolina Civic Orchestra. But the more I watched, I realized they were doing some funny things with our beloved Mozart. The featured piece is billed as the Rondo from K. 417, but they freely mix in a couple other familiar Mozart movements, including the 2nd movement of Mozart 3, the 3rd movement from Mozart 4, and a couple tunes I don't even recognize!
Other fun highlights include when the Little Einsteins sing the tune, and one of the characters (Quincy) plays the horn. My favorite is when they follow the swimming "French Horn" through the ocean in YouTube Part 3! In Part 4, they play a clever countermelody on the conch shell.
Here's Part 1. I highly recommend watching all 4 parts, but if you're pressed for time, Part 3 is my favorite.
Unfortunately, I can't find out who the horn player is. Some of it sounds a lot like the Alan Civil recording I have. Anybody have any other guesses?
On a somewhat related note, I came across this other gem on YouTube...