CABLE LOCAL TV CHANNELS

We Live in south Mississippi.
We use ATT for wifi etc.
We also have TV antenbas for local chsnnels n orhers such as Halmark and somecodd ball channels etc.
The Channels come through good in the living room. This is where the cable is connected to our router/modem box.
My husband wants another cable rin into our back bedroom. Wouldnt this cost us a lot more or csn the cable be just directly hooked to the TV.
I dont want to pay for another router etc.

Sorry not real savvy on this..
Thx