I didn't take the time to make this a complete tutorial, nor write tabs. These are the chords that I picked up in an afternoon, and I thought it may be helpful to post to the YouTubes.
There are variations of this theme through the film, yet I think it is in C originally. C is way too low to sing for me, so I've taken those shapes and capo'd 2, but of course the shapes would work the same regardless if capo'd or not. And for the sake of learning, I have appegiated each chord, and have not attempted any stylistic fingerings for this recording. Add your own interpretation of timing and picking.
Have fun!