When I helped a friend set up his LG C2, we plugged it into Ethernet just long enough to update its firmware, then promptly disconnected it, never to even set up WiFi.

Why even do that? I fear every time a device connects it is going to download a new batch of ads to share until it next connects, disable some existing feature, or install copilot/other useless feature that slows down the already anemic CPU. I am going to trust that whatever firmware shipped on the device is capable of display video and leave it at that. I already disable all of the post-processing effects I can find.