if u want a easier solution buy a chromebook and hang it with a string like 0,5cm behind the passenger seat....in the headrest pins ....
its usb charged and a 17inch is cheap,,
then buy a 60 watt usb c 12v plug
. boom laptop becomes tv and it runs on usb , i just fold it down when driving and flip the screen up when watching a movie,,, or the news, D
the charger is not really needed but the usb in the car is only 15w or so,,, it takes forever to charge ....remember the proper high capacity usb c cable... D
however u can also just put it in the cars usb while watching as it drains slowly then. making a charge last days of rain and movies,, D