I've recently, started recording my solo rides.
Mainly so I can report nasty incidents to the police and provide some evidence, so that they may actually do something about the problem.
I was very reluctant too, largely for the same reasons
@Sharky cites. Already, I mildly resent having to charge the camera up and lug it around, just because of the way other people behave.
However, the way other people are behaving is negatively impacting my cycling experience to quite an extent already - and even if I pick out the worst incident on each ride and report only that, then hopefully I'm contributing in some small way to making the roads safer by helping, in the long-term, Police educate and remove the idiotic/impatient drivers from them.
FTR I'm using a Technalogic DC-2 Pro helmet mounted camera, because it is one device to record the front and rear view simultaneously. It seems okay so far, although at lower light levels, at FHD @ 30 FPS, I didn't get any frames in which car registrations were clear during a couple of incidents on country lanes where I encountered drivers that were racing each other. I'm now testing it using FHD @ 60 FPS. The other mode I have to try is 2K or QHD which is 2560 x 1440 and that's only at 30 FPS.
FHD = Full high definition, 1960 x 1080 pixels
FPS = Frames per second