This technique from Sensei Sofyan Hambally is how to release from hair grab.
Then sensei sofyan hits the groin. It is a deadly attack.

then Sensei Sofyan trying to drop (nage waza) uke (sensei Aam Hidayat)

Finally Tori  finishes by atemi waza

(yan/14/02/07)

And the new one from Sensei Aam  is how to release from hand grab when you are shaking hands. (for the next ephisode... please come later)