There must be more to the story, that video was started well in to the event, but it certainly doesn't look good for UA at all.
I once had to reduce weight by 10 people in an unusual tailwind situation and the cash offer exceeded US$1,500 plus food, hotel, transportation, and the next flight confirmed, etc. People jumped at it. I feel bad for the first 2 people who accepted $500.
I would have rather cancelled the flight then let it get to the point of dragging people around - but - the good news is that, if this played out as published, this guy will probably be getting enough money to charter his own jet in the future.