There is no reason a camera cannot be on all the time… Why couldn’t it?
Sensor wear, mechanical parts (if any), heat, etc. Essentially wear and tear. Just like nothing lasts forever, using it in a way that it’s not intended/tested/quality assured, may reduce its lifespan.
Basically: “is the device intended to be on and recording 24/7?”
Glad to know. 2-3 years is a good lifetime, especially when compared against keeping the phone unused and stored in a drawer.
The camera is on all the time
That’s what I meant: I don’t know (as in I have zero clue) the camera is designed to operate that way. Is a naive assumption on my side and I’d be glad to learn this is not the case.
PIR sensor
No, I didn’t expect a sensor, that’s what I tried to say: the hardware is not there, so (on my mind) a constant image analysis/monitoring would be necessary in order to perceive movement and start recording, as in writing video to storage.
I’m not aware of software to achieve this, but I assume it wouldn’t be possible to activate the camera based on motion detection, as the phones do not have hardware for this. Sure, it could be possible to have the camera working 24/7 and only record when there’s movement in front of it (e.g. watching for pixel changes in the image being captured) but I doubt these cameras can sustain that kind of uninterrupted use, meaning at some point they will just fail. Just my thoughts, as I find the idea interesting but would love to have that same kind of solution.
I vouch for Syncthing as well. I enabled storing in my own remote hosting provider marking it as untrusted, so my files are encrypted there.