Appears there were 5 vehicles all told on a day out with rain forecast. After they'd tried to cross the second river they realised they'd miscalculated the conditions.
On the return journey 2 managed to cross, 2 Discoveries without snorkels considered it too dangerous & decided to park up & the Defender finished up as seen.
Lack of safety ropes for the man wading in the first video when it's stuck in the dark is also a concern.
There's a couple more offroading vids by AGR productions on youtube.