The story was quite difficult for me to understand clearly, but I've got a lot of ideas.
I suppose main character was a human. (It didn't look like a human, looked more like a robot, though.) At the ocean floor, he was walking around and looking for some clear water to live. However, it was quite difficult for him to find enough amount of water, so he was nearly dead.
Then he found out that there was a source of water on the top of building. It took for a while for him to climb up, but he made it with barely left clear water in his body.
He saw a tree, and there was a small ball holds water inside of it. It looked mysterious and also beautiful, but he destroyed and poured clear water into his body from it. Suddenly, a fish jumped on the ground,and he found out that what he destroyed was a dwelling of a fish. He felt really sorry, and put a fish inside his body.
I am not really sure, but the story seems like it's based on the fact. The Earth has "water" in the ocean, but that water is not clear enough for human to use or drink. This video is a warning for the world to use limited water wisely.
