Thanks for the suggestion. RKing (of here and BlenderQA) also helped out in this regard. Essentially, the way that certain directions (to think of it as N-E-S-W rather than X-Y) are controlled is kind of odd. So, like, to crop from the bottom, you basically but in the percentage of the image that you want to be there (let’s say 90%). But then you’d figure you could put in 90% from the top, too, but instead you have to go 1-.9, or .1. That probably doesn’t make much sense, but with the jump-start you and rking gave me (and Halley, too), I’ve made some progress…
…But I agree with BlenderComp that it’s totally unintuitive and odd. I can’t say that I’m a total video production expert, but I’ve used a good number of programs over the years and I never remember a simple crop or stretches being so weird.
Thanks for the suggestions about the final low-res to HD issues, BlenderComp. These are going to last maybe seven seconds of screen time, and so I think that, one way or another, it’s not going to be a huge deal. Actually, I’m doing this as much as an arbitrary project to teach myself as anything else. I’ll compare the sharpened and “enhanced” version with the original, and see which is better. But it’s not going to make-or-break the video, under either circumstance.