&quot;I really like the idea of torrents being used to distribute anonymous derivative works of copyrighted media.&quot;<p>This reminds me of fan-provided (third party) commentary tracks.<p>Are those still a thing ?  When I first heard of this, many years ago, I was very excited about the idea of seeing interesting films with interesting background&#x2F;commentary&#x2F;metadata provided by well-informed commentators.<p>Did that ever go anywhere ?  Do people still do that ?  Any golden examples of this kind of work that I should look into ?