It's always about vetting the source. YouTube can be a source of news, just like articles online can be a source of news. But you have to ask yourself if the author and/or publisher is credible.
That's why I hate every single little "infographic map" that gets posted on repeat. There's often no traceable source at all. And people just accept it as fact because it aligns with their world view.
Posts like this, and most comments to be honest. Really makes me question how low the bar is in the US in terms of general education. You all talk about "Freedom of speech" while not having a single clue as to what it actually is.
Freedom of speech, protects you from your government (with some exceptions, often being, threats, incitement, disclosing classified information, and things of that nature), that's it.
Freedom of speech, is all of those people saying all of those things, without facing criminal charges or other forms of retaliation from the government.
It does not, will not, and never have, protected you from losing employment because of what you say.