You will see a nice option many of us use. It is an HDMI wireless transmitter/receiver. You hook up the Direct TV receiver to the wireless transmitter via HDMI and then another HDMI cable goes to the TV. Then you can hook the receiver, via HDMI, to any TV inside or out, and presto.
I use this setup for my bedroom TV. The other thing you will need is an RF remote for the Direct TV receiver. That way you can change channels from the second TV. Note - when changing to a RF remote some Direct TV receivers require an additional antenna dongle that plugs into the back of it. Without the dongle the RF won't work. It all depends on which receiver you have.
Retired electronic technician (45 years in the field)
2017 Greyhawk 29W
solar & many other mods
wife (maybe I should have given her top billing)