Can I use uplink on switch to send cameras

Hi all

I have tried to Google but cannot find an exact answer.

My question is,

If I have an 8 port poe Switch and it has 2 gigabit uplink ports.... can I send 6 x 6mp IP camera signals into the normal ports of the switch and then send them out via the uplink port to a gigabit power line - then the powerline receiver into the NVR?

Hope someone can share if the uplinks can be used in this way, still not sure what their exact use it for.

Thanks in advance.