If you have a Chromecast device you can cast from many apps from your Cellphone. Samsung phones can cast to Samsung devices. From a computer almost anything can be cast with Chromecast.I checked my locals with OTA to be sure. I get them from Lexington , KY.. No tv land. MeTV is there and it is cropped. As our guru Hipkat suggests you can use tv settings to stretch it.
My 9 year old Vizio‘s Settings show option “Wide”. When I select that I see 4 choices : wide, zoom, normal and stretch. “Wide” does nothing. Normal is the default with croppped ( black) vertical columns. “Zoom” seemed fuzzy to my eyes. “ Stretch“ worked fine. Entire screen.
Zippyfrog;
I imagine your tv has the capability to mirror from phone. How do you accomplish that? I heard Roku device allows you to do something similar from pc. I am totally clueless about this.
When you cast you can use your phone or tablet for other things, or turn off the screen etc.