Where it gets tricky is that the reader might not be part of the audience intended by the writer.
It does mean "you, the reader" or "you, any random reader from my intended audience" (e.g. fellow PhDs) in articles like these.
Using it to mean "one" is a different use, in more formal talk.
(Even the audience for, say, 3b1b's explanation of what a transformer is, is niche.)
Recently, Jensen Huang reportedly said he doesn't know where he lives (the address) with a straight face. This 'you' situation here is kind of like the Jensen situation: neither party understands what it's like to be the other party.
Oh you know there is gonna be maths in this one. (clicks link)
"Here are the terms we will use throughout: a 'memory store' is a function f..."
Yes. Ha ha! Yes!