Is there some kind of lock on the cameras? If so, if there needs to be an investigation on an incident, I see this as a delay. Here, the police are relaying and requesting third party video of an accidents all the time and I am sure would love to get their hands of POV video whenever possible.
The camera system I had the displeasure of being subjected to for a few years seemed to have a hard drive of some sort mounted somewhere, as well as a cell phone modem. It would store files, not continuous files, but only files triggered by g-force or other stuff, including GPS speed data, and I think they could trigger it to save files remotely. (But they claimed they couldn't, but the unit could be updated remotely?) Any save files were uploaded around 0200. The files saved were forward facing, and internal with audio, 15 seconds or so in length, with 4 seconds or so 'buffered' before the event.
Here's an example of an 'event' the company that provides those cameras posted on youtube. Cement truck rear ended when braking for traffic stopping ahead.
The video from this hard braking situation would have been saved, uploaded at night, and 'reviewed' by desk jockeys at the camera company, who had never driven a truck. They would then decide whether the driver did something wrong, or could have done something different, and then forward it to the subscribing company. They almost always forwarded the files, even if it involved you hitting a pothole in the road. They could always find some BS 'coaching' situation to forward the files, like this one where the cement mixer did not hit anything, but was rear ended when he slowed to avoid hitting the car in front. 'Driver should have been looking further ahead' or whatver they said. Most companies who paid for these cameras would only pay attention to the legit stuff, the one I worked for was anal, and have a incompetent employee 'counsel' you on the phone, and issue internal safety punishments, eventually leading up to more internal training and harassment.