Not sure if this was discussed upthread, or if anyone here would know (maybe @moko as you seem to be the local hecsher industry correspondent?).
Unverified - I heard over Shabbos that some hecsherim may have access to businesses camera system for live feed, but the owner owns the system and hechsher may not have access to past footage. Is there any truth to this?
that depends on what was set up. If you have admin access, and there's a cloud or onsite storage system, you'll have access.
In general, it's ideal to move toward one system for all locations. We (and others) have found Wyze to be the ideal plug and play for a variety of reasons. It allows for better grouping and sharing than systems like ring or nest. KOF K did a great presentation on Wyze cameras and alarm systems.
Obviously, having a global hard wired system that you control for all your locations is best, but that can cost 10s or even 100s of thousands of dollars, depending on how many locations.
Full disclosure: while we're moving towards Wyze for all locations (Black Friday Home Depot deal 2/$30 we purchased 96 cameras)
This assumes all Kashrus organizations have cameras at all locations. That is definitely not the case.
While remote monitoring of locations and mashgichim is great, I believe the primary and critical reason for cameras is playback when something goes wrong.
While we were going to charge each proprietor for the system, I believe we're not going to do that so we maintain complete ownership over the hardware and control over playback.
One of the nice features of the wyze is that you can give camera specific or group of camera specific access to different individuals