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LG smart TVs caught logging audio with screen off and snooping on local devices
(www.notebookcheck.net)
This is a most excellent place for technology news and articles.
Yeah you are right, you are better of staying away from LG but if you already have one, you could make a subnet for the TV (and/or other IoT devices) with a DNS whitelist to block every domain except Youtube or whatever else is used
I have a separate and isolated net for all my IoT and smart home devices but things like the telly, amp, media player etc need to have some network access. Makes me tired that this kind of fiddling is necessary.