Watch the Two Five online guitar lesson by TrueFire from Play Acoustic Guitar 4: Rhythm Principles
Two Five - Overview is a video guitar lesson presented by Brad Carlton and is sourced from Chord Studies: Open String Chords Vol. 1.
Open voicings for A m7, D add4add9 and D add4 can be used over pretty much any ii V progression in the key of G. Your first and second fingers will serve as guide fingers. Be careful not to accidentally mute any of the indicate open strings!