On video 2. Try freezing at the 11th second. Please understand I'm not criticizing. Do you see how your folding over your left side. I think your trying to generate power but you're not. You're loosing tension. You should be building tension on your right side but balanced on your right leg. Instead your spine is folding over. You then have to unravel back over to get the club head back to path. Its not a clean path back to the ball.
Try keeping your left arm straighter one th back swing and all the way through the forward swing. This will give you a better chance of clean contact with the ball. One less variable coming back to the spot the club has to get to. You're folding your arm to increase the amount of backswing you're creating but in actuality you're not. Keep it straight if you can. Let your wrist create some hinge. It will create some lag and increase speed through the swing.
Fire with your hips. Notice how your shoulders and hips are facing the same angles almost all the way through the swing. When you get to your set on your backswing your hips should fire. That is where the left knee is a trigger. The knee thaws out a little. The hips follow and the upper body then gets pulled through. Your hips are what should move forward. Your head stays back and you end up with the reverse C finish.
At impact try to imagine your left leg, left arm and club all lined up. From the front view like you filmed if you froze the screen at impact all three should be lined up with your hips open and forward.
I hope you find this helpful.