Hi Mike, in the intro for this song you refer to and play the quicker double beat on the start of the 1st and 3rd bar. In the notation though it has it at the end of the second bar and looks like it would be an F chord.

If the Notation is right, I can't work out the strum to make it flow I'm guessing it still needs to be DU some something like this? DU DU DU D (up (quick and muted)) du (fast)?

I havent watched the next sections to see if you change this yet.