According to sleuths commenting on the outage, the TVs expect to talk to a machine with the IP address 18.104.22.168 to confirm they have a working internet connection.
Well, not really. As the output from host shows, the address resolves to a node in Akamai's Content Distribution Network. These things change according to time and location. Currently I get a different IP according to whether I'm coming in from home or the office (just 3km away). To expect a single address to work, and to keep working, for everybody around the world (or even just in Blighty) is optimistic.