for sure bud.DC stretches are far from extreme.
‘Dead hangs’ from a bar is great but please keep some tension on you biceps, do not do a dead hang with all your weight on your shoulder joints.
My opinions of courses.
i use baby weights for everything these days nothing truly extreme going on here.
as far as actual stretching technique i cant really explain i can change the focus all over but has to do with pushing the muscle sort of keeping tension on it if you will. hanging i do for lats and back. then with sort of different pressure or angle for shoulders.
i also hang but toes on the floor and behind to stretch shoulders, chest abs sort of full body for the front hip flexor too.
for shoulder grabbing a fixed bar at about should height and turning into it allows you to pull on the tendons and not hurt the joint. its another move that has helped.