It is difficult to imagine what this video want to express.
In the video, a cute character lived peacefully in the beautiful nature. But this nature were all collapsed and no flowers and no plants exist. The world changed to the dusky world with many debris. Finally, though the character could go back to the beautiful place, it was the space included in the dusky world. It surprised me. I think that it expresses the earth is absolutely polluted. We tend to forget that the environment around us is getting worse than before. For example, global warming and air pollution. They are hard to directly see for us. But it is true that we destroy natute and pollute the earth by ourselves. I think this is the message this video tries to say to us.