I was also happy to learn this week that my Rainbow Serpent 2010 video is being used on the Rainbow Serpent Festival website to promote the festival. I submitted it to their archive a while back, but only recently noticed a spike in the number of views the video was getting, which I can only assume coincides with it being put on the front of the 2010 video page.
If these videos continue to be well received and noticed by event organisers, it may eventually allow us access to organisers, artists and behind-the-scenes areas for documentation. I would certainly love to work with (or for) event organisers to gather appropriate material for a full documentary. Here's hoping! :)