Is there anyone who have tried to make some firework footage?

If so, I would like to see.

And what is the altitude to safely capture fireworks?

Two times i have filmed fireworks at night. Been least 100meters away at 50-200m height. Manual focus, iso quite high, shutter speed and framerate 30 seems do good at least in my experience. Lot of post processing thought in premiere.

and

Urhokas Posted at 2018-1-1 02:07
Two times i have filmed fireworks at night. Been least 100meters away at 50-200m height. Manual focus, iso quite high, shutter speed and framerate 30 seems do good at least in my experience. Lot of post processing thought in premiere.
https://www.youtube.com/watch?v=AZ0vW4Z9orM
and

Nice footage

from the Netherlands

Looking good