mode4kill

It's hard to answer this question with any certainty, but we are a small team, and it's likely all efforts will be focussed on GTA 6.
 
LCPDFR for example entered maintenance mode, as practically all the community demand turned to GTA 5. LCPDFR however was made open source, so people are free to make their own updates for it.
Who knows if a similar situation would play out for GTA 6 & 5.
GTA 6 will be a breath of fresh air for all involved, so I do think the majority of community effort will turn towards it quickly. We've had GTA 5 for a very long time at this point.

I've modified the title to be more precise.  
 
I couldn't think of any plugin or script that does what you're asking. But you can manually turn on Rockstar in-game recorder and Axon Signal third-person overlay whenever you want to record, to simulate bodycam recording without switching into first-person. 

All I know is that if the body camera plugin you use has a POV feature and you are recording via Rockstar Editor, yes. Without running in that POV though is where the problem lies for you. I know a plugin that does it for dashcam POV's, but I don't know one that does bodycam POV's.