Over all it doesn't look bad to me. I like your setup, you are very tight, you have a nice arch. But I think you are losing a lot of power because your back needs to be tighter, as does your grip on the bar. When you unrack the bar, your arms just look a little bit wobbly to me, and when you do reps you lose a lot of energy because you are not tight in your upper body. You bring the bar down, touch your chest, and there is a moment where it just wobbles out of a straight path. You need to squeeze your shoulder blades tighter when you set up, and SQUEEZE the bar as hard as you can That way, the power you are getting from driving your legs in and being arched hard and tight will be transferred into the bar. Right now, i feel like you are just too loose in your arms and back and it is making the lifts a lot harder.
Look at the third video especially. The first two reps are pretty easy, because the bar moves in a straight line. But on the third you touch your chest and it wobbles out of a straight path, and you loose a ton of energy correcting. Then the same thing happens on the 4th. You need to squeeze your back harder and try and crush the bar in your hands, and really focus on pressing it in a straight line. I actually find that pause benching helps a lot with this - you learn how to control the bar on the way down, and how to SQUEEZE into the bottom, maintaining tension, and then fire up hard and in a straight line. Learning how to pause bench properly makes touch n go feel so much easier.
So bottom line - tighter back, tighter grip on the bar, and focus on bringing it down and blasting it up in a straight bar path. You do those things, you will significantly improve the amount of energy you are putting into the bar, which will improve your bench.