Just a thought, if you get a DVD/BluRay Unit and install it (over the sink, top shelf in a Vegas) you can get a two or three way HDMI splitter, plug it into the Unit then run cables to your inside and outside TV's.
On our Vegas I went with a two way splitter (could not figure how to get back to the rear bedroom TV) and ran the HDMI to the inside TV and the outside TV (required removing the Microwave, both drawers below the range, drilling one hole into the panel that houses the fridge at the level of the top drawer, fishing a coat hanger down from behind the microwave - already a big hole there with lots of wires so be careful - then out the new hole...followed by then threading the HDMI back up to the Unit and the other end out to the outside TV). I hooked both up to HDMI 3 option on the TV's.
But if you are planning on that much effort and want to do something real cool: get something like a Samsung TSST SE506CB/RSWD 6X USB 2.0 Slim Bluray Writer External Drive, with MDisc support (@$79.00) instead of a simple Bluray Unit. Still use the HDMI Splitter to connect to the TV's, BUT then connect the Bluray to a Mini Desktop PC (like a Quantum Byte Fanless Windows Mini Desktop PC with Windows 8.1 @ $169.00) and hook it a wireless touch Keyboard (like a Logitech Wireless Touch Keyboard k400 with Built-in MultiTouch Touchpad @ $31.00). If you do that you will have wired your entire RV to be computer ready at any of the two or three TV's you've wired to or you can just use the Blueray Writer to play your DVD to the TV's or TV of your choice.
It will run about $400 with needed cables, and takes the better part of a day.
Sheree & Michael NCNG LTC(ret) with Munpi and Sheba (cat).
2016 Vegas 24.1 E350 5 speed "Ms. Enterprise", Bug-Guard Screen, Recliners, Infotainment Center, HUD, ARC Shower Rod, Safe-T-Plus, Curt SpareTire Mount,Tornado Black Tank Rinser, ext. WiFi Antenna, Roadmaster Tow Sys& Invisibrake.