When I renovated my apartment and redid my electrical wiring, I missed the chance to set up network and tv cable too. While internet is fortunately solved by Wi-Fi, I am not so lucky about TV.
The signal is delivered by the provider via coaxial cables. I noticed there are devices on the market that can pass internet signal over power lines and wondered if there is something similar for TV signal? My searches returned nothing. If this is not possible, is there any other way to pass TV signal without a lot of new wires around the house?