Three tuning options:

Standard Tuning - Capo 3rd Fret (No de-tuning required)
Half-Step Down - Capo 4th Fret (The way I’m playing in the video because that’s how I have my guitar tuned all the time)
Full-Step Down - Capo 5th Fret (The way he plays it in the music video)

Click here for Tabs: Rich Men North of Richmond