I assume this has come about because he's been told he needs the digital nomad visa or a work visa to earn money off Youtube, and if he stays there on a retirement visa he can't vlog and earn an income to live on, so Catch 22?
Every single thing he's mentioned in this latest video is something he was advised about or warned against in comments (and on here) at the time but he dismissed and ignored because he knew better. Moving out there after only one trip without getting a better feel for the place and the people, the International Drivers Permit debacle, the visa, the first posh expensive condo etc etc. But now it's all someone else's fault because he was badly advised???
If he does go back he'll blame it on everything else but himself even though, as you said, in pretty much every comment section, people have been telling him these different things and he just calls them trolls for pointing out that he's working illegally etc. His skin is too thin to be on YouTube, either that or he has such an ego he can't see that he's not always right and sometimes people's advice is actually correct. It was clear from the very hasty move that it wasn't going to last, moving before Christmas after a few weeks of coming back home, it was all fishy from the moment he said it. He would've been better trying to find somewhere cheaper in the UK, not necessarily London if it's too expensive (no idea of the costs now, we've not lived there for 10 years) and go and find different places to share around the south east of the UK.
He'll blame the lower views because YouTube isn't pushing it, not the fact he's boring, having a mid-life crisis, doesn't stop moaning, shoves fried breakfasts down his throat in every video, and hasn't made an effort to showcase Thailand. It's not that hard to move countries, you just need to get the correct advice which comes from expats, and ultimately the actual government and embassy.