I'm a bit skeptical that it is the real deal, especially on the up close shots. The drone would be doing the equivalent of flying through flak, as the fireworks would explode, the air would be disturbed, like a rock being dropped into a pond. Even with a gyro-stabilized camera, the drone should be bouncing around considerably more if it was that close.
I do like the Bocelli soundtrack. I do a piano version of the song sometimes as "filler" music, and inevitably, at least one person will come up and ask what song it is. I think most people recognize it from the dancing waters at the Bellagio in Las Vegas.