Iron Horse - Modest Mouse - Trailer Trash tab?

Hello,

can anybody help me figure out how to play this song: youtube.com/watch?v=ZZYgsMXHY_w


I've found an archived post here: banjohangout.org/archive/181108 but the link to the tab does not work for me.


the song is explained as G, 2D, & 4C. - can anyone help me understand the 2D and 4C part of this explanation. I am new to banjo and would really like to learn this song.

Thank you.