In episode 9, we had this reel in the 'normal' tuning.
In this episode, it's in Open D tuning. The tuning (from lowest pitched string to highest) is D A D F# A D, .
As the tune is normally played in G, the capo is on the 5th fret.
The chord shapes for Open D are, of course, different to those for the ‘regular’ tuning. However, learning them is no different from learning any other chord; and having these under your belt opens up your repertoire.
In the booklet (Book 2), the chords shapes for Open D are on page 43.