It's not often that we get this many handwritten documents - the immediacy that we have, something where King would jot a note to himself or write an outline for a sermon or aspeech, write adraft of aspeech as important as the Nobel Peace Prize acceptance speech.
In the past year, Assange has collaborated with politicians and activists there to drafta free-speech law of unprecedented strength, and a number of these same people had agreed to help him work on the video in total secrecy.