This is an awesome video. I like to compare it a little bit to Cinema Paradiso, an all time favorite of mine. If you fast forward to 2:30 you will see
the phenomena called the Naga Fireballs which take place yearly in the Mekhong province. Folklore has it these are spirits of a great dragon, the Naga
emerging once a year around the full moon.
Science says it is actually a swamp gas, or pranksters. Science doesn't really know.
I have saved a couple still shots of the balls coming up from the water and they don't appear as gas but more of a solid but I don't know either.
Like the actors in the short film I would rather believe the legend of the Naga.