Nathan, to add to what Mike and others noted, you might experiment with wrist hinge as you begin your swing. When the club is parallel to the ground on the backswing around 0:12, the clubhead is behind your hands. If you hinge gradually, you'll find that the club doesn't get inside too much at the start. Mike posted a recent video on that issue.
I think the posture correction that was suggested will help the relatively flat shoulder turn. You might also feel as if you're tilting slightly left to ensure you don't go flat during the backswing.
You're on the verge of collapsing towards the top but the club is still parallel. You might feel as if the club is a tad further away from your right ear - that might shorten the swing slightly with a straighter left arm
Coming down through the ball, you might want to have a feeling of squeezing the elbows so you don't feel the need to turn over the wrists too soon - it comes slightly quick with your swing.
Good work.