It surprised me too AS picked a Blu Ray player with a wired connection.
For a non-techie, I'd say replacing it with a Wireless player, or upgrading to a smart TV, is the way to go.
Since I am a bit of a nerd, I built my own booster network for my 2016 FC. I use two routers, one flashed with DD-WRT firmware running as a Bridge connected to the camp, and one running regular Linksys software to supply WiFi all my devices in the coach. Since my DD-WRT router has an external antenna jack, I use a short cable to a 9 dB antenna.
I just ran a short Cat 5 ethernet cable from My Linksys router to the AS BlueRay player. If you have a decent WiFi connection (2 Mbps or better) video streaming off say Amazon Prime is pretty good. Note: I do not stream video normally, as I do not want to be a 'data hog' on camp wifi. I did it more as a curiosity, really.