Principles of Music: The "La Folía" Progression 

I had to re-upload this video due to an error, I also changed the thumbnail because I found the old one visually too busy.
In this video I discuss how composers over the last 400 years have made use of the Folia chord progression.
A special thanks as always to musopen.org and imslp.org for offering free public domain sheet music and recordings online.