The soundtrack is still in progress, so it's not yet fully available but Ester Dalvit made a very interesting movie about braids and knots. At the end it will be distributed under a Creative commons license.
A trailer and parts of the movie are available here. Up to now three (old versions of) chapters are available, explaining respectively through computer generated animations:
- the group structure of the braid group
- "combing" of braids and handle reduction (i.e. solutions to the world problem)
- Alexander and Markov theorems (i.e. the relation with knots).