Whoa those front feet REALLY need a trim O.o
Hinds don't look too bad though... so is it a bad farrier?
I haven't watched the video, but I quite like him based on the photos. Very short pasterns, and a more upright shoulder than is ideal in a dressage horse [that shoulder is better for jumping tbh] but being that he's essentially full draft [Friesians are light drafts, originally bred to carry knights into war then turned to harness and now being used as riding horses], the short pasterns and upright shoulder come as no suprise. I like his neck set, it's a nice medium IMO between the low-set draft neck and the high-set extremely upright Friesian neck.
Typical draft hind end, in that I'm saying nice big hocks and a sloping croup. If he was lighter I would say he was made to jump - but a LOT of dressage people like a bit of jumping breeding in their dressage horses. All in all I see no reason why he couldn't do some dressage. He's not an FEI horse but he's certainly better built than my gelding [an eventer who is looking at retiring from jumping, he will be my dressage horse if I can't get him sound enough to jump again]. My gelding is only about First or Second-level at the moment, but I'm a beginner when it comes to dressage, so I don't know how much of that is me and how much of it is him.