That is real progress, let me show you why in three snapshots of your first vid. Firstly though i want to highlight the main thing i seen. You were set up pretty well but as you swung the club you were dramatically changing your spine angle or your posture if you prefer. It was like watching you almost try to stand up during your swing and as a result a whole range of things were way out. The golf swing by nature is rotary, its all about a shoulder turn around your spine(in context of the standing up fault) Your last vid is far better--- very well done!! really, what a difference you must be feeling.
Here you are set up quite well, though for future reference bud, less sky and lets see your feet and the impact zone.
NOTE the 100 sign its on a line with your spine up to the base of your neck.
Now look where the 100 sign is in relation to your spine. You have made yourself taller and stood out of your posture which changes so much in a golf swing.
Just as you are coming in to strike the ball see how you are way off your original position.
Please do not mis -understand, we are not supposed to return exactly to the same position as i am sure you are aware but spine angle should be closer than that. There are other things but if i were you i would begin with developing a good hip and shoulder ROTARY TURN. Not lift with the arms and shoulders. Best of luck and yeh some improvement.