I am sure you are aware that it is unlawful to have a TV in a car that is viewable from the driver's seat whilst the vehicle is in motion ? The comment is just in relation to your 'TV in motion' thread title . While some people circumvent this , they leave themselves open to being prosecuted.
There are indeed some tuner modules available for certain ICE systems , but they generally disable front screens when the vehicle is moving , although some allow viewing in the back seat .