No I really do mean the optic cable that goes from the wall jack to the WiFi modem has a green end to it
yes that's the one
Ethernet cables are cheaper and easier to get than fiber optic patch cables. You can just move the Optik TV box and connect it to the router with a longer Ethernet cable.
There are presumeably two cables. One connecting the PVR to the router (Ethernet) and one from the PVR to you TV (HDMI). Both of these are readily availble in various lengths at places like Best Buy or Amazon.