Spot on mad boom. Things like this are better discussed as a learning exercise - the video highlights lots of pitfalls;
Dusk
Last minute change in approach
Waving arms on ground
Positive ground marshalling (but by whom?)
Moving Car
Impending Brown Out
Was he/she trying to fly under wires
What was the experience level
What was the task - weddings/proms can actually be quite daunting with lots of folk about.
All in all its good that they survived - we can learn from it and teach others from it.