>>82958195
Yeah, it'd have to be small like that. I don't know if they'd still be good after all of this time though, you'd probably have to refurbish them because the explosive charge might be a dud. I'd just guess that the OP is from an explosives factory or something blowing up. It'd explain why the guy filming it was filming it. Here's the Tianjin factory explosion for comparison too.
https://www.youtube.com/watch?v=6QlhtthMP-I
For anyone curious you can also see the Beriut explosion for something else similar and with a nice mushroom cloud.
https://www.youtube.com/watch?v=LNDhIGR-83w