How to record Mac screen above 60 fps? (120fps, 144fps, ProMotion)

Shift + Command + 5 generally works great for recording the screen, but it doesn't even seem to try keeping up with ProMotion or any above-60 FPS display. According to QuickTime Player, the directly saved .mov encoded FPS is 59.86. I'm trying to precisely scrub through a fast system animation, but I can't find any way to record the screen at that framerate - built-in or with an external app. Of course I could put a high-speed external camera to the screen and just try that, or find an high-tech HDMI capture card (as I use a Mac Mini), but those are kind of awkward solutions for what seems to just be a software lack.