If your opinion is that you don't want to get involved, I'd take down the camera or hide it in some way so that person B doesn't approach you to ask for the footage.
I can't speak for what's best for you personally, but as an outsider, it's clear that you need to let Guy B know that you have tape, and if possible, also inform the police. Maybe Guy B is a little hot-headed, but Guy A is frankly dangerous. In the best case scenario, an investigation into the car accident might lead to Guy A be arrested or otherwise removed from your neighborhood.
If your opinion is that you don't want to get involved, I'd take down the camera or hide it in some way so that person B doesn't approach you to ask for the footage.
Wait, so Guy A:
whereas Guy B:
I can't speak for what's best for you personally, but as an outsider, it's clear that you need to let Guy B know that you have tape, and if possible, also inform the police. Maybe Guy B is a little hot-headed, but Guy A is frankly dangerous. In the best case scenario, an investigation into the car accident might lead to Guy A be arrested or otherwise removed from your neighborhood.