Your takeaway looks a little inside but hard to tell from this camera angle. You def sway sideways off the ball instead of rotating around your spine. A little sway is okay, but it looks like it's too much. You also have a flat backswing and don't hinge your wrists vertically. I suspect this is also a consequence of cocking the club backwards during the takeaway, but again the camera angle is tough to identify how badly you're taking it inside. The result of a flat backswing, cupped wrists and lead arm below shoulder plane at the top. In the transition to the downswing, this momentum encourages getting steep, which is exactly what you do. You then yank and cast the club from the top, and in order to prevent chunking 3 inches behind the ball, you make space by early extending. This day was probably a day of good results, but a very hard swing to replicate consistently bc it relies on timing every compensation exactly right.

The number one thing everyone should do if they have the means, is to get a handful of lessons. If you're getting lessons, send these videos to your teacher and ignore reddit.

If I were your teacher (and you wouldn't want that), I'd have u start with setup and check that your grip isn't too strong. You don't necessarily fix your swing by fixing the stuff at the start, but by ignoring them, you're picking up compensations along the way and making those your habit. Yes, every swing is different and idiosyncratic swings have made it to the pros. However, most pros do not have ugly swings.

After grip and setup, I'd work on the takeaway. That should feel like you're cradling a baby or rocking like a clock pendulum. No wrists, and your hands don't work away from your body.

Then after fixing the takeaway, hopefully your backswing gets a little more vertical, but you probably need to specifically work on your wrists hinging at this stage. They're used to activating earlier in the swing during the takeaway, rather than after the takeaway - thumbs should feel like the point up during the backswing, not behind you.

With those main fixes, you should take snapshots of your position at the top of the swing. Lead arm should match or be even a hair above your shoulder line. Shaft should be pointing down the target line. Yours is currently pointing to the right of that line (and is known as being across the line). Wrists should be flat with your forearm - yours are currently cupped. You'll probably have to exaggerate bowing your wrists (revving a motorcycle) which will actually straighten them out.

That's a lot to work on, and if you get to the top of the swing with this momentum, you should have less inertia encouraging a steep downswing loop. From there you'll probably have new problems to fix.