Set - up:
Too much weight on left side.  He needs to be sure his weight is more evenly distributed.  Be sure shoulders are centered over hips and shaft is more vertical than leaning to the left.
 
Top of the swing:
Too much weight on left side, knee and toe. Left knee has moved toward the ball. Caused by right hip and knee raising in the back swing, caused by improper set-up (see above).

Downswing and follow through:
MUST react to the backswing!  Causes a casting or throwing motion at the start of the downswing with an excessive lifting of the left shoulder, left hip and feet in the downswing and at impact.  Although the weight eventually gets to the left side, at impact the upper body (the true power) is moving away from the target instead of towards the target.  Hence, the finish looks "off" and is a result of the rest of the swing.

Better balanced set-up to start. 
A GOOD SWING WILL NEVER MAKE UP FOR A BAD SET UP.  A GOOD SET_UP CAN ALWAYS LEAD TO A GOOD, SIMPLE SWING!  A solid base is the key to support the power from the upper body rotation and delivery of the arms and club.

From the balanced set-up, rotation begins in the core or abdomen area with the sensation of tightness in the right upper glute and right hip.

From there, a proper firing onto the left side will result.  That will also relieve all the fat and topped shots that he had during the first few holes in the tournament he last played in (read his blog).

Would love to see the swing in daylight where he could use higher shutter speed and I could see the club better.

You'll see in the video during set-up, to square shoulders with hips I moved the ball up in my stance and have a slightly stronger grip. My hands (I think) do not look too forward and I feel more balanced.

During take away I've been trying to not push my weight too far to the right, but, notice the turn doesn't seem to be as strong; the swing feels full, but doesn't look it.

Do I need to start doing trunk-twists before bed? Should I be trying to get the club parallel to the target at the top of the swing or is "almost" OK? These 5-iron shots are still going 200-210 yards...

Notice on the side view, at the top of the swing, hands change plane slightly (bad). Related to set-up?

I attempted get back into a one-plane-swing in the last clip. It's looks pretty good, but, right foot falls a bit out of line at finish.

Looking better!  I am still seeing a couple of things I would like to see done better. 

Your set-up from the front view is much better. You still have a little too much of your upper body over your left leg.  I would like to see it more centered between your feet and the triangle of your arms more matched and "over" the triangle formed by your legs.  This is a big part of the reason your arms are still initializing the swing which in turn causes your right hip to rise slightly in your backswing when your hands are waist high and the club is in the "L" position with your forearm.

At this position (in the slow motion version from face-on) you will also notice your weight is leaning into your left knee and staying on your left side as the club moves to the top of your swing. (From the down the line, or behind you view, you can see how your left knee has moved down and towards the ball).  IT IS MUCH BETTER THAN IT WAS! I would still like to see your chest a little more over your right leg at the top.

All this can be mostly solved by the change in address position I previously mentioned.

This position is causing the upper body to initiate the downswing and causing the club to swing "out" on the first move of the downswing (also known as "over the top") and creating a steep plane into impact. From the face on view, I can see you are turning your hips well but you turning into your right hip instead of your left as evidenced by the amount of pressure I see in your right toes just past impact.

From the view behind you, your upper body posture is picture perfect!

The lower body is still a little too balanced in the knees instead of the hips.  To achieve this, sense that you are pushing your femurs (thigh bones) into your hamstrings.  This will set the upper leg into your hip socket, resulting in a balanced, strong position in your hips.

To test if you are in the correct position, do your best to pick up either foot off the ground.  You will sense it very difficult to do if you are into your hips correctly.

The reason you need to do this is that because you are in your knees at address, your upper body and head lowers in your back swing which causes the opposite to happen coming through.  You will also notice your spine angle has changed at impact also.  This could still cause some fat shots, thins and pulls.

All in all, pal, IT IS IMPROVED!  A couple of comments on your comments.

"During take away I've been trying to not push my weight too far to the right, but, notice the turn doesn't seem to be as strong; the swing feels full, but doesn't look it." - Let your weight move more into your right hip.  That is ok.  When you do, you will sense that your turn is much stronger.  And your swing IS full!

"I attempted get back into a one-plane-swing in the last clip. It's looks pretty good, but, right foot falls a bit out of line at finish." - You will find your plane once your set-up is perfectly balanced and secure. The reason your back foot falls a bit out is your balance was still in your knees throughout the swing.  Once you are more into the hips, the better your balance and finish will be.

Keep working!  It is looking better.  Practice hard on the range.  Learn to trust what you are doing and just go "Do It" on the course.

By the way, picture quality was much better and was easier to see what I needed to.  Thanks!

GOOD LUCK and Play well.