Let me start by saying that I have enjoyed fireworks at home and have always used extreme care and caution so as to not light multiple sources at the same time.
The video starts with a surveillance cam overlooking a small party of people who are talking about fireworks.
Suddenly, a rocket fuse kick a flame over to another firework which is right behind a parked van. Various balls of flame start shooting out the side, igniting a few other fireworks in the yard and making the family's van blow up.
It's always a good idea to store other fireworks in an effort to avoid chain reaction accidents like this one.
Photo credit: NICHOLAS KAMM AFP