Exploiting Domain-Specific Knowledge: Spiral [pdf] (vjovanov.github.io)

This presentation is rather hard to understand without the text/speech that goes along with it. I don't suppose there is a video of the presentation?

The talk was part of a summer school at EPFL: http://vjovanov.github.io/dsldi-summer-school/

Afaik, everything was videotaped. I'm sure the videos will appear soon.