Title says it all. Great, the treat printer made a video that fooled people convincingly at the low low price of a few more burned acres and a few more dried up lakes and a few more tons of carbon dumped into the sky.
Must we repeat that trick until it kills us all? 
Honestly those language YouTubers are most of the time using some sort of trickery to come across as more proficient than they really are, and they're doing it to sell some app or whatever that super duper promises that you will, just like Famous YouTuber, become "fluent" in [ridiculously short time span]
You don't gotta hand it to them
I did notice pretty much all of them are trying to peddle a product with their language gimmick.