First, don't worry about your arrows yet, frankly you aren't ready to tune anyway. That's NOT a slam just that your execution won't allow you to tune yet so just shoot the arrows you have and don't worry about it.
Your full draw position in the second video is better than any of the others. Your bow shoulder is down, your string forearm is in good position, vertically but can't tell about horizontally.
First two videos, Do not point the arrow up like that! Then watch your hands as you draw. They move differently and not together. String hand moves then bow hand moves. They need to move together. Lift bow to draw (arrow about eye level) and keep arrow level to the world then as you draw, BOTH hands come down together.
Third video, string elbow starts too low and stays too low. I'd discard that technique.
These statements are based on the style I teach and you will probably get other input that you should consider!
I'd also recommend that you set the target at shoulder height and 5 or 6 feet in front of you and just work on the sequence for a while, don't try to hit a bull's eye just use the target to catch arrows for a while.
Arne