CFP has linked a number of videos of the Beirut explosion:
https://www.citizenfreepress.com/breaking/breaking-massive-explosion-in-beirut/
Whole lot of sparking and flashing can be seen in one of them. Whatever it was, it sure blew up good!
Great videos in that link. Comments there were interesting. Nobody is buying the fireworks lie. One said perhaps Israel found out where explosives used by Hezbola ( spelled wrong) were coming from and they took care of business.