Photo's not great and I haven't watched the video but from what I can see she's nice. Good hindquarter, nice shoulder. Maybe a little camped under with the front legs. Good back shape. Maybe a little small in the hooves and light in bone. Too much length and maybe a bit much heel in the front hooves (might be causing her camped under stance - hoof angles have a LOT of say in how they stand) but a good farrier should be able to fix this.
Not much gaskin compared to the sheer mass of her hindquarter. She may be a little downhill too - the overlong front hooves would be to mask this so she doesn't look as bad. Perhaps a tad too much pastern slope.
She looks like a nice horse, I'm just being harsh. Purely because they want so much money. That is a LOT of money to pay for a horse that is still a prospect! She is 5 by Australian aging rules and not quite that by US aging. Still a baby, so she SHOULD still be green. If she's not, then you have soundness issues to worry about. No matter how talented a green horse is, it's no more than a prospect, because you can't take it out and ride grand prix dressage (or top level reining, barrels, jumpers, whatever) on talent alone. It takes training as well.