You can still set up your own HTPC in your living room and configure it yourself.
And there are more solutions like from Apple (but they absolutely fucking track you as well) or other streaming box/stick solutions I am not aware of.
Unsure how good an Nvidia Shield is in regards to privacy. Your best bet for privacy is probably to just build your own solution on Linux.
Appoxo
CDs
Yup. And if you can't find one, you can still get most of that second hand from pages like discogs.
Jellyfin is even better.
My next TV will be either a business/signage monitor or a computer monitor.
At least something without any connection outside. No network, no anything.
At most something like a Chromecast or similar.
I think my only contact with 4chan was to get JAV content and also my first contact with torrenting.
You could limit the firewall to IP range(s) of your domestic (and other places of interest like work) connection.
This way they won't come even close to even logging in.
And then you could do the other hardening on top.
There are still countries other than the US.
lol.
With the current trend I feel like the neonazis AfD will put us right back to Temu-Hitler (Trump) and Putin.
Weird.
Mine is just Anime, vtuber, tech (the good kind) and edutainment (e.g. kurzgesagt, real engineering, ezc.).
Maybe you engage heavily in political content because I mostly avoid it like the plague.
Your questions sounds like a problem obsidian.md and similar solutions could solve.
There are some very special videos.
One time I read about "Naked Yoga" videos being published uncensored on YouTube (so basically soft core porn).
Me not believing that (due to the high fear of popular youtuber being demonetized just because they said "ass" or "fuck") searched for that and low and behold, there are people absolutely uploading basically pornhub level content on YT.
But YT lock those videos behind the age wall you have seen in OPs post.