Ask HN: How to Record My POV?

I want to create a video recording of my POV.

Optional:

- Sound

Baseline is to use a GoPro camera mounted to a helmet but I want to improve on that.

Bonus points for

- low weight

- small dimensions

- long battery live

- long storage

- camouflage e.g. if my counterpart might not even notice that I am recording

What do you think are good options given this preferences?