Don't forget or dismiss the other input option:

You can always use the RF modulator in the digital receiver to create a UHF TV channel containing the digital TV signal.

In a similar way, you can add extra cameras or other devices, all operating on separate modulated UHF channels. They become mini TV transmitters.

That way you can put say a front camera in the car, and instead of cabling the video signal, use the RF modulator.

Likewise, when towing a trailer, fit an RF modulating camera on the back of the trailer.