Just came across this thread.
If I've understood correctly should the cable from the camera be terminated in a keystone jack and then a patch cable from keystone jack to the nvr? Or have I completely misunderstood?
There is no reason to do it this way unless you simply want to.
You can run a your cat 5/6 cable directly from the nvr to the camera simply terminating it on both ends and connecting it directly to the female adapter on the camera and directly into the female POE port on the back of the NVR.
Adding punchdown blocks, keystone jacks, etc only introduces additional points of failure.
In corp. environments - professional buildings - the typical standard is solid core cable from a network rack/punchdown to a keystone jack in the wall/office. Then 6', 12', 18' stranded cable jumpers are typically used from that punchdown/keystone jack to the final termination point.
This is typically done because those cables are traditionally moved a lot - phones moved, offices moved, PC's connected/disconnected, etc. This keeps your main line undisturbed. While allowing the more flexable patch panel cables to be the ones that are always screwed with.
Typically in a home environment you will connect your camera and connect said camera to the NVR then never screw with it again. Its not like you are always connecting, disconnecting your cameras at the NVR to reroute cables, reroute single, shut down specific ports, like you would in a professional office environment where IT is always adjusting/changing something.
Often times cables sold in large spools are meant to be terminated in either a patch panel or keystone
Take a piece of spare cable and try to crimp an RJ-45 on to it, if you can and it fits you can terminate the cable runs with RJ-45, if not you may be forced to use a keystone. While it is considered a best practice to terminate cable runs with keystones or face plates ultimately
I would say consider the aesthetic of the final install, match the use of keystones and face plates or raw cable run to RJ-45 connectors to that end.
This is not factual information... Bulk spools of cable are perfectly fine for making jumpers and terminating into any demarcation point (connector, patch panel, keystone jack, etc). No where have I ever seen that bulk cable is intended to be used at patch panels and keystone jacks. Any individual that finds himself with a half a brain and using a descent amount of cable has a bulk 1000' spool so anytime they need a cable they can cut to length and go!