What model Roku devices do you have? Model numbers, not names please. What channel are you referring to? Roku players don't receive over the air TV, so I don't know what you mean by a local channel. If you have Roku TVs, then of course it makes sense. And if they are TVs, we need the manufacturer's name. Roku does not build, sell or support the TVs. They are supported by whomever makes them.
Dan Ultra (4640), Ultra (4670), Ultra (4800), Premiere (3920), Insignia 720p Roku TV, Sharp 4K Roku TV, Nvidia Shield, Windows 10 Pro x64 running Serviio and Plex on a wired Gigabit network.