Good video. The advice to close it all the way and then open 12 clicks as a starting point is helpful. I wonder if that is the initial setting that the factory uses.
I like to open it up to where it won't lock back on the empty mag with one round fired, then close it again until it does, adding two more clicks after that. That's the way I learned to do it on my FAL.
12 is too far for RDB without a suppressor. 7 is more typical.
Adjust till you get these two:
1) Last round bolt hold open
2) Slightly dented case neck rim
Nothing new here, These have both been in the instructions forever....