https://youtu.be/lRK8UMudejg?si=HSlzAosdWp5yMX-q
Camera follow path
https://youtu.be/hsOPnBWjDkU?si=LtUmMB9OpDMlpXft
This guy is using damped track constraint which probably works best for flying objects.
I used track to instead.
https://blenderartists.org/t/camera-roll-when-using-damped-track/589296
I'm sure I've learned this before. Several times :-(