Making a screen recording that ignores zoom

Low Vision Accessibility on Apple Products

I'd like to make a screen recording. I've tried to do it using QuickTime, but the result comes out zoomed. I'd like to be able to zoom in during recording, so I can see what I'm doing, but have the screen recorded as if I didn't zoom.

I believe this used to work with ScreenFlow, but I just downloaded the trial version to test it again, and it comes out zoomed as well.