I wish PD12 separated crop only from zoom/pan (or maybe I'm missing it).

I would like to crop to remove the 'top' of a video, then basically have PD12 'resize what's left' to the original 16:9 without any zoom or pan motion. There were some kind answers to a similar question I posted a couple of months ago (making an HD video from a 4K video) where I didn't really understand all the keyframe explanations to eliminate motion, but I did get my HD video from the 4K because I was able to accept the tiny pan/zoom that happened.

Now, I want to try and learn the 'no movement, just crop' workflow.

In this case, I made a time lapse of chocolate chip cookies baking, but want to get rid of a distracting section (all across the top).
It is small (I measured to 60 pixels deep, Y axis, on another program) from my 3840x2160 4K output. I am ok with changing the aspect ratio of the final product a bit since these are only cookies in an oven, but want final output at 16:9.

I still don't get setting keyframes I guess. I read another post that talked about selecting 'Duplicate Previous Keyframe', but if I select the clip>Power Tools>Video Crop>Crop Video>the crop window pops up, then all I can choose if I click on the double diamond+ symbol is 'Duplicate Next Keyframe' as the 'Duplicate Previous Keyframe' is greyed out.

Is there a simple workflow to cropping without motion effects? And maybe without having to learn Keyframes just yet?

Thank you