Move cameras and VCR off main network

I suggest that you do some research into Ethernet Switches, the routers' LAN ports are an Ethernet switch. See how these can be used to separate traffic flow over a LAN and then I think you will find that the solution is actually quite simple, especially since your cameras are wireless. This might help; https://en.wikipedia.org/wiki/Network_switch “Microsegmentation Segmentation involes the use of a bridge or a switch (or a router) to split a larger collision domain into smaller ones in order to reduce collision probability, and to improve overall network throughput. In the extreme case (i.e. microsegmentation), each device is located on a dedicated switch port. In contrast to an Ethernet hub, there is a separate collision domain on each of the switch ports. This allows computers to have dedicated bandwidth on point-to-point connections to the network and also to run in full-duplex without collisions. Full-duplex mode has only one transmitter and one receiver per "collision domain", making collisions impossible.”