Unfortunately that is how youtubers make their money, they make all the grand claims and they attract people to their channel, otherwise if you just tell that you don't know what is going on, they are not going to give you any views or ads so you would be a bad youtuber. At the end of the day do not trust anyone when it comes to bitcoin, only trust yourself and what you think will happen, no one else matters.
Warren Buffet is the richest person on earth amongst all people who made their profit by investing, sure there are others who are richer but they all have a product or a business, Warren Buffet made it with investments. However when it comes to bitcoin he said it was in a bubble, that was about 2 years ago, now we are ten times bigger. So anyone in the world could be wrong about bitcoin, never trust others let alone some youtubers.
I think regular people are getting a bit more attention these days as well. They are not getting watched as much as youtubers who act like they discovered fire, I agree that these huge grand ideas, not just in crypto but everything on youtube, when doing huge claims and all, they get more views.
However I watch regular miner channels for example, people who are not really doing big claims and all, people who show the grind, show building it, basically all around regular things, and in the end they have been getting bigger and bigger. So it turns out, it is a quick way to get viewers to say big things, but it is also a lot more sustainable to do things right way, that will allow you to get viewers and also will keep your viewers coming back constantly, if you lie to them one of your videos will be watched but that's it, you will be gone and not be a youtuber.