I'll Fly Away - David Durrence

I recently ran across a youtube video of David Durrence playing I'll Fly Away.  It looks like he's playing it only by strumming and fretting the first string.  I like the song and the simplicity suits my level of expertise.  I've searched around on the internet and can't find that arrangement.  Would anyone have any idea of the tuning or tabs for that arrangement?  Thanks.

Greg