Wow. The "designed to fail" backdrop on the video says a lot about this. They're aiming for clicks, rather than rigorous testing.
I'm not at all surprised that TVs aren't designed to be used 24/7 by residential users. And I'm not at all surprised that running them for 10,000 hours straight causes a lot of problems for them.
And I wouldn't be at all surprised to find out that overworking them in the short term like that isn't the same as using them regularly and normally for 6 years. Some of those things might still happen, but some of it is death from overheating.
This already happens with those comedy talk show hosts. They create rage-bait stories and spin them for good entertainment, and people think it's an accurate look at the situation. I used to kind of enjoy them until one of them hit on a subject I had just researched and knew immediately how they were spinning it. I can't stand them now.
So while this is a concern, it's one that's already being done on a much larger scale with people who feel a lot more trustworthy. I'm not really worried about some kids that are also doing it.