You may be able to root the LG TV and use https://github.com/webosbrew/youtube-webos, which supports ad blocking and sponsorblock. Or you could install it with developer mode, but developer mode has a limited session time.

I don’t see why you couldn’t. Just connect multiple controllers and configure accordingly.

In my experience using an older android phone for self-hosting, the downside was a lack of ports and I/O. Being stuck with a single USB 2 interface and wifi was less than ideal for my use case.

I ran a Minecraft server on termux and (IIRC) AnLinux once. It worked surprisingly well.

If I am remembering correctly, Australia also has laws that allow the government to force private companies to build backdoors. I think it was the Ass Access Act.