Help with David Phelps' What a Wonderful World intro chords

Im working on a guitar arrangement of What a Wonderful World and I really love the version David Phelps did on his album, Classic. It's nice and slow and easy, not flashy, and I love it.

I just can't figure out the chord progression in the intro. I'm not versed in music theory, so I usually just end up plucking it out. However, I'm really having trouble with this one.

I've searched everywhere for sheet music, guitar tab, etc., but haven't had any luck. The main verses and whatnot are simple and don't deviate from most other arrangements, so I've got those nailed down. It's just the intro that's getting my goat.

Any help would be greatly appreciated!

Here's a link to the song.