The following four clips discuss the importance of putting quality first in an agile project and talks about what is technical debt.

I extracted these clips from the recording of an Introduction to Agile talk that I did last fall. This was a 75 min talk in front of a developer audience of about 50 people.

Part 1 (2:16):

Part 2 (1:41):

Part 3 (1:39):

Part 4 (3:07):