Is he a native American English speaker?

[WilliamTaft]

Source: The Middle East's cold war, explained, YouTube

Is the narrator a native American English speaker?

 

[jutfrank]

Yes.

 

[dedicatedenglish]

Source: The Middle East's cold war, explained, YouTube

Is the narrator a native American English speaker?

I'm not a teacher but I don't think this is the right question to ask. A native English speaker is someone whose first language is English. Second language learners can acquire a native like accent if they learn it early enough. The speaker has an excellent American accent though.