I have being doing extensive research on this method lately and can confirm it works. I also noticed in the past there were plenty of youtubers who were changing the title and thumbnails all the time but I never put two and two together. Either I would notice it or someone in the comments would point it out.
Ironically Mr. Beast use this method all the time and you can see for yourself using his tool called ViewStats. I only use the free version and you can look at a plethora of channels that tells you how many times they change the thumbnail and title. Mr. Beast would change his multiple times. Sometimes the thumbnail and title or just one of them. It really does not matter since you don't have to change both to get the algorithm attention.
There are Reddit threads going back years talking about the method but those threads never caught much attention. I discover this recently as I was investigating the method. As a matter of fact that picture you first showed, that channel change their thumbnails all the time. I want to personally congratulate you for sharing a working method and for those of you who are reading this or lurking around, ignore the comments that are going to say this does not work. That's a typical rebuttal you see on here and Reddit in order to deter you from the truth.
