

As long as as humans haven’t succumed to brainrot and still have capacity for math and logic, we can figure it out. It’s encoded, not encrypted.
The classic problem of long-term nuclear waste warning messages is about conveying information over cultural barriers. This is a concrete data type, not interpretation of vague contexual meanings from pictograms. Math and logic don’t change while cultures do. Images are far more retrievable than the meaning of an image.
As far as I know, none. “Smart” in smart TVs means ads, data collection and profit, they aren’t about to leave money on the table.
The only way to get “dumb” TVs is to purchase digital signage TVs meant for in-store displays and other business use. In fact, they’re better than ordinary TVs with improved cooling and rated lifespans, specially designed to run 24 hours a day in a cafe or smth.
Unfortunately, companies don’t sell it to individuals, you have to buy it as a company. You either have to buy used or set up your own shell company. I’m this close to setting up a fake company to buy a TV, but I’m not sure if it’ll work. Hopefully there’s no secret legally binding TOS or smth.