In your video, at 3 minute mark, for instance. His guy has just came up to your court, his play hasn't even started. There is no pick&roll action in the horizon. But out of no where (you could also say, randomly) Paul George, who is surprisingly a PF in your team, gets sent to double team the guy in the perimeter. This repeats in your opponents next possession. PG13 goes to double team the perimeter guy again, this time as the player who's actually the furthest away from the ball
Doesn't seem like blitz to me, at all... It's more like the good old Double team cheese. Let's be honest.
And no, PG13 is not a good PF, let alone being an amazing one. He works for you against certain teams, because 1) he creates a mismatch on offense that some players aren't able to counter, and 2) he's very quick and he's a good defender that fits your double team oriented/abuser defense as the double teaming PF. It'd be a hussle to send a big and slow PF every time to double team the perimeter guys, right?