My personal opinion is that in the first video, the arm bar isn't used to advantage, therefore the opponent isn't controlled. I don't see any real pressure placed on the elbow or shoulder, only a trap of the right arm...
Any who disagree, I would like to hear other opinions. It's how we all learn.
I think I see more arm control than you in the first clip. It looks to me like Bas is in a position to use as much forward pressure as necessary to turn his opponent and keep him from firing the right. He does torque his opponent enough to set up the palm strike. After that, it doesn't matter. He maintains control with pure aggression.