We use a laptop with a 17" screen. Those of you of "A Certain Age" will remember when a 17" Sony Trinitron was considered top of the line color TV. Still good enough for me.
We carry part of our 300+ DVD collection when we are on the road. Never any reception problems, 6 hours battery time, and we don't have to use the camper battery.
2015 T12RBST Flagstaff Hardside
2008 Itasca Meridian 37H