Nice footage. And a lot of work. Sadly, there is no story there. There are traces of a story, but nothing substantial. There is some insight compared with the regular youtube clip, but the maker does not get far beyond a privileged position at the fights. In the end, I doubt there is something the production team hides, rather the connection is simply: each one is trying to use the others. The fighters want publicity and better memories. The producers want a marketable product.
