Jackpine,
I believe you are getting the cart before the horse a little. You seem to be trying to artificially choose an "anchor" point and then drawing to that artificial position. In your videos, your head is moving all over the place, usually first back, then forward and down. You get it into a different place each shot.
One video shows your string hand thumb under your jaw, a position I strongly support and recommend! In other videos you have it sticking straight up on the side of your face. That position for the thumb places huge amounts of tension in the string hand and I have found that that position basically is you volunteering to have a less than great release. It also moves the arrow nock OUT from under your eye.
By artificially CHOOSING your "anchor" and using that as a "target" of your draw, you tend to ignore the body structure for the shot and consequently end up with the string arm elbow problem you mention.
So... Hold your head still, don't "cuddle" up to the string; DRAW TO YOUR STILL/UNMOVING head. Set your arms, shoulders (bone on bone) during the draw THEN!! set or identify your facial references. Keep your string hand thumb rolled down and hanging over your palm. Then once at full draw lift your string hand to facial references. You MAY get a tooth, a bone, whatever but it will be a RESULT of your full draw position and NOT an artificial target of the draw.
YOUR FACIAL REFERENCES ARE A RESULT OF THE DRAW, NOT A TARGET FOR THE DRAW.
Arne