I had to look up what acromion is. After looking at the chart, that is the pain that i'm having. The first time i did the warmups in the video, it got worse so i stopped doing them. After a few months i decided to do them again because it wasn't getting any better (i thought it was gonna heal by itself). I just worked through the pain and now my shoulder feels better. I know it will never be 100% again but i just have to live with it. I'm just happy that it doesn't bother me when i bench. Dips, however, aggrevate it so i stopped doing them. It also hurt after i did DE bench last week, that's why i mixed up my grip for DE bench this week and for next week i'll probably do DE paused bench.
I'm glad your shoulder feels better now. I hope your knee would feel better too. I remember you mentioned that you have tk knee sleeves but don't wear them everytime you squat. Just make sure you wear them. I used to have knee pains too on my right knee and it disappeared after i started wearing knee sleeves. Good luck dude. I want to catch up to your squat and bench, but not this way