What is up with the people claiming the Continental Baekje Theory on YouTube?

For the past few days, the algorithm has been pushing some Shorts to me.
It keeps recommending them so much that I can't help but watch a few.
They make these absurd claims, like how the Yangtze River is actually the Han River, or Guangzhou is actually Gwangju.
I can excuse YouTubers doing this just to make money, but when you go into the comments of these channels, people are making such ridiculous claims that I start to doubt if they are even Korean.
These people are definitely history conspiracy theorists, right?