Dorian

The dorian mode is found on the II degree of the Major scale. It’s one of the minor modes and its characteristic interval is the major sixth.

Scale Construction

Scale

Fingerings

Fingerings

Harmonization (triads)

Triads

Harmonization (seventh chords)

Seventh chords

Harmonization (quartal)

Quartal

Dorian riff

After all the theory, let’s take the guitar and play. Here’s the chart of the riff you heard in the video. The scale used is A dorian.