Yes for each tv will be a small box that the Ethernet Cable (
Cat5e) plugs into which converts the signal to an HDMI cable and into the tv.
You could use something like this. I just found the first example so don't get picky on brand or price.
https://www.amazon.com/OREI-HDMI-Ex...-fkmr0&keywords=HDMI+Over+cat5+4+way+splitter
If you needed 4 tvs to receive the signal for instance. You have a box at the source ( NVR ) that splits the signal over 4 cat5's and at the ends are recieving boxes that then convert the signal back to hdmi.
But also understand if your house is normal size you may get away with 50ft hdmi cables and not need something like this... This is just for long runs. It's hard to describe an instance where we would need this but I took a photo of me in just one part of this guys attic... I'm 6'5" and I look like a kid in just ONE PART of the attic of this house. lol. This isn't used for small homes.
https://c1.staticflickr.com/5/4758/28181697219_ce0d442385_c.jpg
Cat6 is better if it's needed. But understand that this cat5e wire is 100% dedicated for this one very specific purpose of a image only. Never will it be something else.
Every single tv ALSO GOT CAT6.
There's literally no reason to have ran a cat6 for the sole purpose of seeing his cctv.
There's no advantage. Each TV was already getting a Cat6 Cable for dedicated internet to it. lol
On top of this, Each TV box, Data box also got smurf tube so for some crazy reason he ever needed another wire ran it was no problem at all.
Also price can become a factor when you start running 5,000 feet of it for this specific purpose since it can be almost twice as much $$ lol.
All in all we probably ran 20,000 feet of cat5e, cat6, RG6 Coax etc... lol
Did I help you at all? Hopefully I did.
Here's your normal HDMI splitter you probably need for runs up to 30ft long. Problem is every hole you gotta make is bigger because the entire freaking connector has to fit...But you'd use one of these and cables up to 30ft long. 30ft not long enough? You can use bigger splitters that can send an image over a 50ft hdmi signal. Been there and done that.
https://www.amazon.com/HD-104-Power...517211564&sr=1-4&keywords=HDMI+4+way+splitter