I worked on sequencing the backswing a bit today. I was trying to feel like I was initiating my swing with my arms and holding off rotating, because I was turning too fast before. I think I did moderately well at achieving this goal. My secondary aims were to keep my right arm straight and keep trying to add right hip extension, with mixed success. Hopefully, I can execute all of these components at the same time with practice over the next few weeks.
On my downswing, I'm definitely flippy and my head moves back a bit. Not sure if it is due to something earlier in the swing or a compensation/hold over from my prior swing. I will probably work on this next, after the above pieces are in place. In the third video below, I am experimenting with this a bit. I am feeling myself "hold the angle" a bit longer. In the future, I also want to try feeling my head translate down the line and maybe open up a bit faster at the end of the downswing and see if those things help at all.
Experiment: