I didn't get to see, but it had to be put out with a fire extinguisher, so I'd say it wasn't going to be in good condition. I'm guessing the heat of the firework set the plastic body alight or something. I have no idea what brand or make it was, other than I was told "Later on they're going to have an early model drone that they've attached a waterfall to, as an experiment"
I was there with Overall Photography who were there doing the aerial footage for the event. None of us would have done that with our drones. Not unless it was hanging 6 foot behind it on a fireproof heat proof line ... probably not even then actually.