I use a GoPro for recording fishing and hunting. Frustratingly when I got my GoPro there were no clear instructions on how to use GoPros for field sports. There was plenty of information about how to use them for all sorts of other things like surfing, mountain biking & skiing but nothing on the very specific needs of hunters & fishers.
My settings are based largely on trial & error with more error than success with Game birds. The GoPro is much better for fly fishing.