You definitely do look like a Medium pacer. That last video of you does seem like you're getting the action right. You seem like you're practising enough, your follow-through seems pretty good. How are you placing your fingers on the ball? Like I said Spin King is an excellent help telling you the basic actions you need.
And your angle still can be worked on. From about my head to my body, it's about 30* angle and my attempt at an arm ball is around 20* angle. The changes make a difference and it helps if you try something like that.
Your wrist action seems limited, you need to expand it more but I haven't seen your wrist action as it's kind of hard to see. If your start turning it a little more it helps but that will also depend on your release.
There are a few things I notice in spinners actions which you may want to try for fun.
Warne style - Seam up, Thumb on the front of the seam, finger a little bit above the your thumb on the seam, middle finger should be directly opposite to the thumb and your 4th finger should be directly underneath.
It's hard to explain so I kind drew an image. Just showing you an example, this is what I use for spin and I can spin it quite well into the right hander and away from the left. And I am not a spinner at all.
I have other styles but I'd like to see where you're at first.
