The video is shot from inside a plane carrying a group of skydivers. They were 12,000 feet in the air above Superior, Winsconsin when a second plane, also full of skydivers got a little too close. The wings from the first plane disconnected causing a dramatic explosion.
All 9 skydivers were thankfully pretty much unharmed and the two pilots also lived. One of the pilots had to be taken to hospital for minor cuts.