Do you mean the public video on their youtube channel https://www.youtube.com/watch?v=h6lTZnbCeJs ? I cant find something different in the forum than this (or do you mean the 1 month old video?)
No that is the one. I did not want to post the link since it was in the backer forum, but if they made it public on YT they must be ok with it. Anyway, still cool. I wonder when they will release the ALpha.