It was a bit hard for me to readthe directors point of view.
In the clip, a little animal(varmint?) was studying the nature. However the nature was suddenly destroyed and all the flowers died. The place became very polluted and when the animal came back to the nature it was only a small part. I think it was trying to tell that air pollution has become a very serious issue. So to tell the audience about the seriousness the director took this type of way. I also think that it is saying that this is all everyones fault and that you must act fast.
