The only good thing is that it was such a short time between it properly going wrong and hitting the ground. Only a second or two.
From the camera angle available - and I'm sure the NTSB have far more videos and stills, and comparing it to the same manoeuvre being flown at previous shows the rolling action may be different
like this one~ 11:00 is the same pass.
The nose pitch up before the roll in this case appeared lower (compared to a previous display), and led to an application of down elevator early(to raise the nose while inverted) at about 100deg AoB, which caused to roll to skew to the right (towards the crowd line). At the same time, the roll rate appears to slow appreciably until they get almost inverted (which is doesn't on others, note the nose is still quite nose low), when there's a large application of up elevator, accompanied with right roll (it's hard to tell if this is the aircraft "departing". Then it's game over as they run out of height.
I'm always a pessimist when I see "brave pilot saves school/nuns etc", but actually, I have a suspicion in this case, he (the pilot) made a mistake, which was fairly terminal anyway, and has taken the aeroplane in a safe direction. If so, a brave decision.
RIP.