Gosh, just watch it and deny that there are dmg mods in this game. I don't care how it SHOULD work, when I see how it works. Maybe there are hit confirmations in bf, but certainly no dmg confirmations.
I'm not watching the garbage. I fully understand how the hit registration and damage calculations work in this game as with many many other games. I work directly with top tier game engines. I write code, level design, 3d model etc. Have been doing so for the past 20 years.
Stop letting BS videos manipulate your thought process. Learn about the mechanics and processing.