What does matryoshka have to do with it?
That's one transistor is hidden in another, just like the doll. Generally fakes are simply made with smaller die or one genuine part relabeled to mimic another. Hiding a complete packaged transistor in another transistor is something new.
I didn't really understand the meaning of publishing this video...
I guess for the same reason you don't understand what it has to do with the doll. It's not about there being counterfeits as such. But about ridiculous internals.
Just means a few matryoshka dolls inside each other.

But everyone knows that there are a lot of fakes on Aliexpress and buying serious things there is a very big risk.
In Russia, Chinese quality has become a household name. When it was very cheap, people were not afraid to lose small money.
I think most of the sellers there work during the day on building houses, laying asphalt, etc., and in the evening they collect orders and go to the local market to collect them and send them.
I don't know where the Chinese Communist party is looking or why it allows cheating.