Watch the Intonation Regulation online guitar lesson by Brad Carlton from Chord Studies: CAGED Chords Vol. 2
This is a vi - IV - I - V progression in the key of F. The first chord is Dm played with a Cm form. Watch your intonation on this one, as it can be tricky to get it in tune. Work on transitioning cleanly to the B♭ with a G form. Next we go to the F chord with a D form - again watch your intonation here, there is a lot of opportunity to pull your strings sharp with this shape. Then we go back into familiar territory with a C chord in the A form.