Should I use 2.4 or 5 Ghz for my WiFi?

2.4 is the older standard of band which is slower but reaches further. 5 GHz is faster at shorter range. However, 2.4 GHz what most smart TV and TV consoles run on. By default, both our routers - Linksys and Ubiquiti offer both bands. With Ubiquiti, 2.4 shows up as...