Better than 4, that's for sure. The sheer number of GoPros used is pretty crazy. I wonder if that one grey wheel is on purpose, or due to a "oops" in practice.
As for Block.. My opinion is that he isn't the best driver out there. Give me a car like that I can throw away and some time and I'll do the same stuff he does. That said, he has single-handedly done more to promote rally and motorsports of this style to young people than anyone else has in a VERY long time. Motorsports participants are aging overall, and young blood is always in short supply. Just go to an AutoX and see how much grey hair is out there. But I've seen more people raise their hands as first-time attendees at driver's meetings the last few years and I'll wager a good percentage of them saw these videos and were encouraged to do something FUN with their cars.
Is Block a show-off and attention-hog? Yes. Is he a world-class driver? Not really. But is he a good thing for the sport overall? Yes.