Looks like I’ll get a small front load Blu-ray player and strap it inside the component cabinet enclosure.
Curiosity got the best of me since all three TVs have a coax cable, and two HDMI cables plugged into them.
I found all the HDMI splitters in the wall in the bedroom (thanks to the electrical CAD drawings on the Winnie web site). There’s two HDMI cables inside the component cabinet, one for a DVD player, one for a satellite receiver. They made it easy to connect additional sources, and all three TVs have access to them. I can get a pretty good compact Samsung Blu-ray with WiFi at Wally World for around 80 bucks. Problem solved, Happy Camping!