How to implement two locales on one router?

Question

Video

Good afternoon.
Please tell me how to implement the grid correctly.
Given:
Zyxel Keenetic Giga III router
managed PoE switch D-Link DGS-1510-28P /A1A
IP video recorder (2 network cards)
N number of IP cameras
N number of computers
Essence.
The Internet comes to the router (locIP 192.168.1.1), all computers and the DVR are on the 1st subnet, all cameras inside the DVR are on the 0th subnet along with the PoE switch and are away from the main router.
Task: It is
necessary to configure the network so that the Cameras and Computers remain on their subnets, but at the same time the cameras have access to the Internet, and I have access to the 0th subnet from the 1st subnet.
Although the PS switch is managed, I won’t use it in delimiting networks, it only works as a PoE switch, nothing more.