But look how vague the answer is compared to the one immediately below it:
First question: "Is Fallout 4 2277 Exactly? Or is there a few years difference etc. as Todd was clear on the "200". But people are skeptical."
First answer: "200 years"
Second Question: "Hey pete have you played any fallout4"
Second answer: "yes"
If Pete was being straight up with his answer, then why not clarify it properly as requested by the person asking the question, by saying something like, "yes, set in 2277, which is 200 years after the bombs fall". If you were clarifying a multiple-part question with nothing to hide, you would not give a vague answer, which is exactly what Pete did.
When we now add this to Todd's latest comment about the game being set "mostly after Fallout 3", we can clearly see that they are both being intentionally vague. If it were parallel with FO3 as many people believe, then surely Todd would have said "at the same time as". Also, the 'mostly' part clearly stems from the fact that the tutorial has already been shown as taking place pre-war.