I often bring a small wifi router with me, hook it up to Ethernet (often taking the TV or phone ethernet connection), then set up a local wifi that I can connec

I often bring a small wifi router with me, hook it up to Ethernet (often taking the TV or phone ethernet connection), then set up a local wifi that I can connect a Chromecast to. That in turn sits in the tv, of course. That gives me internet and streamability/casting to the tv :)