No worries. Since the swing is a 3D motion, it's helpful to see how the pieces fit. In general, I think about 70% of the swing is better to see from face on, so down the line only is leaving a lot of helpful information out of the equation.
Looking at your swing, I get the sense that it could be one of those lessons where I start in one place, and end up in a totally different area by the end of the lesson. But, I'll try to give you some guidance.
In general, the steeps and shallows have to match. Steep arm movements help golfers move low point forward and create speed. So often, if you get shallower arms, you'll move low point backward temporarily.
The direct influences for your steep transition are:
1. Lack of ulnar deviation (both in transition and at impact)
2. The lead arm not pinning (hands well outside the shoulder, which makes the wrist movements look less steep then they actually are, but could cause shanking)
3. Loss of trail shoulder blade retraction
More often than not, I work on fixing this pattern by starting at the release. Looking at building a better impact and follow through (this was hard to see without face on). You can see at impact how you actually have some radial deviation and your trail arm is fairly straight. That combo is usually accompanied by a steep arm transition.
One other question mark for me is looking at the top of the backswing depth of turn and axis tilt. That could contribute to the steep look.
I hope this gives you a couple of ideas to play around with
Happy golfing,
