The video starts innocently enough, with a group of off-roaders watching one of their friends attempt to ford a shallow looking river. Things quickly go sideways however, when the driver of the silver Grand Cherokee just plunges right in and quickly gets in over his head. The river is moving faster than the driver thinks it is, the driver panics, makes some bad decisions, then the jeep is turned over and swept downstream. Eventually, the jeep is hauled out by a Land Rover after a long comedy of errors that involves one guy losing his trousers to the current and the Cherokee ingesting untold gallons of water.
What went wrong here? Well, It's pretty obvious from the video that the Cherokee driver didn't have a clear idea of where he was going or about the condition of the riverbed. He chickened out halfway across the river, and in what appears to be a misguided attempt at turning back, he reverses, digs himself deeper in the riverbed, then turned broadside on into the current. When he changes his mind again and decides to just gun it for the opposite shore, he drives directly into a deep water hazard that would have been obvious to an experienced off-roader. At that point the jeep and the driver were doomed.
Hopefully the driver learned a lesson here, and hopefully he didn't pollute that river too much with the jeep's fluids.