Looks like great progress to me, Slice!
-Followthrough looks perfectly fine- is there something specific you don't like about it? When I swing in my garage the ceiling keeps me from fully extending, even though there's plenty of room, but your extension looks good.
- You've done much better on moving the head less, but I think a tiny bit more to go.
All in all, looks pretty darned good, man.
If I were pressed to give feedback, I'd suggest (my humble opinion, as I'm UNTRAINED!!!):
- Your backswing looks a tad rushed to me, maybe think about Kenny Perry and slow it down. Or Inbee Park! Lol. I know if you exaggerate the feeling, it can help. To me, it looks like you sling it back quickly.
- Your backswing also looks like a little bit of a "C" action, where you head dips down and right a bit. I think it should be more of a coiling, with weight shifting back (not the head, of course). You look like you're in good position to HIT the ball (and you make good contact, but maybe not in the classic "coiled' position to uncoil and let a nice easy relaxed swing whip the club around.
-Looks like your first move on the backswing in slow-mo is your hands. Have you tried delaying your hands a bit, and start moving back as "one piece?"
Again, take with a grain of salt. Let's see what the experts say. Looks pretty darned good, and I bet you are hitting more consistently recently. I've lapsed a bit from golf myself, but need to get my groove back before the season ends! I'm thinking of actually getting some 5SK sessions over the winter.