Great intro and what a video!
You're a real eye-opener. I've listened to it several times (also without video for less distraction). The mix is well balanced, the instruments respond well to each other. It's really good.
The section transitions are punchy, and you've thrown in a few ear candies here and there.
The only small detail is the sound of the trumpet at 1'16", which is a little loud and contrasts with the response of the violins.
Otherwise excellent!