I mean, if that video doesn't confirm how close it is to 2020... Certainly from an AI standpoint... Just look at the AI's goals.
My favourite bit is when he says defending is much better thanks to the improved responsiveness, then immediately concedes a goal because his defender jogs past the danger.
(Love TTB, by the way - he points this out himself.)
In all honesty, I think the increased responsiveness is just bewitching people into thinking the game is 100x better in many ways, when you can see from gameplay videos that... Well...
I can't help but notice all the things from PES 2020 that would stop any sane person from playing the game for very long in a Master League or similar - the dreaded turn-shot goals from the AI etc...
You've also got Salah in minute 20 of the video, unable to use his pace to burst away from the defender, so just kind of jogs in a circle instead. TTB says "oh man, I can't get the ball off Salah" but in reality, he stood off Salah and gave him an empty channel to run down - and Salah TURNED AWAY from it to jog around in a circle instead.
It doesn't represent football at all. Players aren't human-like. Responsiveness is increased a bit and people start raving about movement being organic - if it was, you would see players leaving defenders for dead, instead of having the catch-up issues (again, see Salah unable to outpace the defender). It's just awkward, bumper-car stuff a lot of the time.
...but I understand that there are a lot of people who just want to play a football game and are happy to take a few improvements and enjoy what they get. That's fair enough, and in truth, I'm jealous of that.
Fair play to people buying 2021 knowing what they're getting - but the idea that all 2020 needed was a responsiveness tweak (as if that was the only major issue!!) and now it's (and I quote) the "perfect" football game... Come on now...