This is why I always say the the sauce and cheese is a DEGREE above the crust in level of importance. Great sauce/cheese can compensate for a sub-par crust; but the reverse isn't true.
Years ago, he did use a combination of 75% OO flour and 25% high protein flour. I would guess the high protein flour was all Trumps since so many east coast pizza makers use that flour; but in recent years, it appears, that the dough recipe has changed; and my guess is that it's because that oven is no longer reaching the high temperature it used to reach. His son on a more recent video was pulling out a finished round pie and mentioned that it took 7 minutes to bake. In another message around that time, a customer timed his pie being baked and it was an 8-minute bake. His father once mentioned that a pizza shouldn't take more than 5 minutes to bake, so the new 7 - 8 minute bake, I'm assuming, is because that ancient oven is on its last legs. Also, seeing the mountain of those HR all-purpose bags, assuming again, that those weren't just for bench flour he had always used that flour for, and also seeing also a bag of Caputo 00 chefs flour visible, I think, he had changed the recipe, for the lower temperature bake. The current dough could be something more like 50-50 the 00 Chefs flour and that HR All purpose, or maybe 75 the All-purpose and 25 the 00.