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I watched the video again in full screen and it looks like a port. That kind of port is sort of like an airport for ships. It will have large concrete parking areas, even more fuel than where aircraft are, and big trucks. I saw trucks over that concrete wall near and perhaps even in the fire. I didn't see a ship but there might have been one there behind the fire.
Doesn't look like a penal colony but there is one near there.
The only thing keeping me from Berdyansk is in that video, you see a RR crossing sign, followed immediately by double layer walls and a section heavily barbed wired. I saw the same trucks too, couldn't tell if fire fighting or military vehicles.
By now, if it was berdyansk, it would have been geolocated as there are pros out there that can Id a place quick. Lol.
I've tried and I suck. Lol