One current high-speed option is a MoCA 2.0 network through the existing coax, which has bandwidth up to 1 Gbps. I have a MoCA adapter next to each TV, wire the

One current high-speed option is a MoCA 2.0 network through the existing coax, which has bandwidth up to 1 Gbps. I have a MoCA adapter next to each TV, wire the television through Ethernet from the adapter, and hook up a WiFi repeater as well.