Hammer-claw finger-picking is a technique used in country, jazz and sometimes blues music where the guitarist plays with their fingers rather than a pick. In this style your thumb is the “hammer” and your fingers are the “claw”. Your “hammer” is intended to play the bass strings, (E, A and sometimes D), and replicate the job of a bass guitar, while your “claw” plays the chords on the higher strings. The really cool thing about this technique is it can replicate more than one instrument, which can thicken-out a solo performance remarkably.
Below are the charts for the 4 chords you’ll need. Although other notes are used between these chords, these are the shapes you’ll be holding down the majority of the time.
Here is the tab and notation, broken up into each figure as discussed in the video.