There's one thing I recognize simply because it's something I've personally been working on. I think your upper body comes down to far. Your shoulder is at the same height from the floor as your glutes at the bottom. The good news? This change will actually make the swing easier (unlike other changes that sometimes make the swing harder for a while). Notice that after your rear end stops moving back, you continue to fold forward. Once you have loaded your hips by sinking back into them as far as you will, the extra range of motion is really just stretching the hamstrings more which isn't necessary (any SFG's reading, please correct this if its wrong).
I'm not skilled enough to feel comfortable giving positive feedback that is accurate, but to my limited experience trying to show other people the swing, that is very good and crisp. You are on the right track and since it feels natural, you will probably respond to cues well. Keep at it!