There are also PoE over Coax devices if your house (like mine) was setup with NTSC security cameras: https://www.amazon.com/gp/product/B07G194BQD https://www.am

There are also PoE over Coax devices if your house (like mine) was setup with NTSC security cameras: https://www.amazon.com/gp/product/B07G194BQD https://www.amazon.com/gp/product/B07G194BQD This device picks up PoE power and ethernet at one end and delivers up to 21w at 100m to the remote end (less for longer runs). Enough to run most IP cameras. Speed is only 100Mbps (up to 300m, 10Mbps at 1000m) but that's more than enough for 4k live streaming. It also supports transmission over twisted pair instead of coax. You can use that to pipe Ethernet and PoE over twisted pair doorbell or phone wire. Apparently a common usage is getting Ethernet onto older elevators over the legacy twisted pair emergency phone line. How much bandwidth and power you get depends on the quality and type of wire - in my experience it does a decent job adapting to conditions.