Erick,
First, let me say that you've really done quite well if you've been able to get to this point without any instruction. You're one who can evidently translate what he reads, sees, and hears, into 'correct' physical skills.
You've selected a slightly 'open' stance which I also happen to use and prefer. While I shoot Mediterannean/split finger, if I were just starting out today, I'd go with the three fingers under, as you have done.
The one area I see that could very possibly cause you problems down the line is the muscle group you 'appear' to be using to hold your draw wt. Here's what I see: In your front angle film strip, there appear to be some draw length variation of about an inch over the four shots?
In your rear angle film strip, your drawing elbow appears to be just 'outside' the desired line from your arrow tip, through your shoulders to your elbow?
In your side angle film strip, while your release hand stays at your face upon release, it appears to be more of what is commonly called a "dead" release. I've seen this form of release used very effectively by some former, top level, professional shooters.
The elbow 'outside' the desired line, coupled with the "dead" release indicates to me that 1) you are very strong and 2) that you're holding your draw wt with your shoulder and upper arm muscles.
The more 'desired' group of muscles to use, not only for drawing but for holding at full draw, are the muscles in your back, more specifically the large, flat trapezius muscles that start at your shoulders and extend down your back on either side of your spine. These are the muscles that one uses to squeeze the shoulder blades together, and that's exactly the feeling you look for when drawing and holding using your back. As has been pointed out by other TG members, technically, the Rhomboid muscles also get into the action, but I'm a believer in the "KISS" principle, so I refer to the Trapezius as the 'primary' back muscle in use.
Why use your back muscles instead of those in your shoulder and arms? Because they're larger and stronger. You're arm muscles are more prone to fatiguing, resulting in collapsing, creeping, and plucking the string,i.e., pulling the string out from your face upon release.
You've done remarkably well. If possible, I'd recommend highly that you take some good instruction to help you refine what appears to be a very sound, shooting foundation.