For the readers who may be interested in the work Alain and I did on renormalization and the Riemann-Hilbert correspondence, as well as in a general introduction to the Connes-Kreimer theory, I noticed recently that the series of lectures of the minicourse we gave two years ago at Vanderbilt University have now been put on You Tube (or Google Video).
You can find them here:
Lecture 1 (1 h 52 min) by Matilde
Lecture 2 (1 h 7 min) by Alain
Lecture 3 (1 h 10 min) by Alain
Lecture 4 (1 h) by Matilde
Lecture 5 (1 h 30 min) by Matilde
Lecture 6 (1 h 25 min) by Alain
Lecture 7 (1 h 24 min) by Alain
Lecture 8 (1 h 7 min) by Matilde