Just FYI, the Chromecast supports ethernet, depending on the model. I believe some of the older Chromecast Ultra models have an ethernet port on the power brick, and the newer Chromecast with Google TV models (which I believe is the one you're looking for) are USB-C, and you can power it from a hub, and it'll connect automatically to a USB-ethernet adapter on the hub. This is also how you'd extend the storage of the Chromecast, because the onboard storage is criminally small.