You did not give model of coach?
In my 35UN I use a HDMI wire ran thru cabinet where satellite box goes and pull it out to plug laptop computer in. The pop-up main TV has extra HDMI ports so I just select #3 and plug wire to computer for DVDs, Netflix or what ever I want from computer.
2015 Jayco Precept 35UN
Towing JEEP TJ with Roadmaster plates and bar w/Blue Ox Patriot brake
an Aluma low bed trailer with HD Road King and/or Polaris RZR onboard