Element tv unclear of what it is

It is possible that you could force the firmware for the 1080p model onto it to get 1080p resolution if it's firmware locked to 720p.

My brother did that with an Insignia (Best Buy's house brand, I think).

I don't recommend it unless you're skilled with electronics and know how to recover the firmware on bricked equipment, because it really can brick the TV and void the warranty.