It is a little hard to tell but you look like you have a very strong grip. The left hand for sure, not so sure about the right but it looks strong too. On the behind shot, it seemed to me you are bringing the club way inside at first with a very flat swing plane. This puts your left arm plane well below the shoulder plane at first but the left arm plane then ends up at the top well above the shoulder plane. On the driver video your clubface looks very closed at the top. The bottom line is that I think it is a swing with a lot of movement of hands, wrists and arms that could make timing difficult. I wouldn't know where to start for advice. What is your ball flight like? Do you have a lot of slices, hooks, duck hooks, gentle fades, draws? I see you are attempting to get your back straight in your set up but the stance overall didn't seem comfortable. Your contact with the ball seemed alright though.