The barre chord is one of the most useful chord fingerings for guitar, as it contains no open strings and can be moved to any position on the guitar neck. It involves placing the index finger firmly over all six strings (five for the D family) to perform the function of a capo. When sliding along the neck, only the root changes, but not the shape of the fingering.
In the listing above, the barre chords are arranged by family according to their position at the 1st fret.
1. row → E family, root on E string in barre finger
2. row → A family, root on A string in barre finger
3. row → D family, root on D string in barre finger
4. row → G family, root on E string in 3rd finger
5. row → C family, root on A string in 4th finger
In the video, the guitarist demonstrates a quite strenuous exercise in which all these chords are arpeggiated in sequence by means of a continuos picking pattern. The goal here is to make all the notes sound as cleanly as possible, which is not an easy task for beginners at first, until the gripping hand has built up enough strength through regular practice.