Are there fake polyglots on YouTube? [ENG CC] 

what I know and what they say too much and cause a series of mistrust the person comes to say I am fluent in 4 our 9 languages but only one 1 depending on the nationality of your country of the person if you don't practice not live under another form of language if you rust anminesia arises due to lack of practice.

6minutes & 3 secpnds: very true!

The question is not who is fake or not. Is who is real or not.

those scammer polyglots on yt are the worst

well D Tammet did it in one week in Icelandic, but he is one of a kind probably; now if you feel more stupid than D Tammet it i snot D Tammet's problem; you still have the right to be amazed and inspired by D Tammet

how can a person be B2 and C1 and not able to speak? Sorry but seems like you know nothing about how language learning works.