Re the low flying, I said earlier,
Besides the fact they could possibly be breaking the law regarding low flying........But they are obliged to comply with the rules of the country in which they are operating, which of course could very well be different.
Had the low flying taken place in Australia, unless a number of pre conditions had been met, they would have been breaking the law, which is subject to strict liability, the penalty being $(Aus)9,000 in this instance. The lowest altitude permissible over open country is 500 feet.
Since we have no idea where the event took place, we have no idea what rules may have been in effect. The regulator in Australia has successfully prosecuted a number of people based on Youtube video. You need to be careful.