@futurebird this is sound advice, and I thank you.
I was watching a soccer final last year where all the referees had shirts on that I apparently had a pocket on the inside for an iPhone with the back lens facing outward through their shirt. I'm not sure how they controlled the video recording, but it was effective. They were actually streaming so that people watching the game could see from their angles.
I've been thinking a lot about that lately because it would be an interesting way to film. Someone would really have to look directly at you and scan you to see that you had a lens on your chest or wherever.
My plan (since I don't carry my phone when I go to protests) is to have my GoPro affixed to my person somewhere. The drawback is, to get the footage, I have to take the SD card out and put it on my laptop at home.
I need to practice. I did that with my inflatable costume and the tech I had on me before I did the last big protest and it made a difference.