The Millennium Stadium thing was for the Tsunami concert. It was a thing that I think every band in the country would have liked to be a part of at the time that it happened.
I like the idea of the documentary as a portrait. There's not a chronological beginning, middle, and end structure. You build something in the editing room that's shaped by getting to know the person and digging deeper, unpeeling the layers of them as you get to know them.

