Turns out it was a Facebook group of (mostly) US based farriers who'd started playing it after it was posted by one of their members. There were quite a few interested comments, some supportive comments and a few posters who had made the decision that the whole thing was an internet hoax and a pack of lies - they were, of course, less constructive in their comments (though they were not clear about what they thought we were faking. Perhaps that the shoes had been photo-shopped out?!).
I must admit that I can't get too interested in the negative comments (after all, it was filmed at the RRR completely ad hoc and with total transparency) and certainly not until the people who post those comments can produce horses as sound and capable - and with hooves as healthy - as the ones in the film :-)
However, there was one pungent and repetitive criticism which a number of the group made; several of them said that "the music sucked". I'm not sure whether it was Brokeback Mountain or Labi Siffre whom they hated most, and it wasn't the politest way to express their differing sentiments, but personal opinion is fair comment and one person's favourite track is another person's anathema.
So, in the interests of making the footage more enjoyable for the group, I came up with this version...
Personally I don't think it quite has the piquancy of the original, but each to his own...What do you think?