To give you an idea of how tiny this is, a human blood cell is about 7-8 micrometers; bacteria range from 1 to 10 micrometers. Each glass sphere in the video is only 1 micrometer in diameter.

I just watched this online last week. In parts it's quite stunning. The concept of the glass sphere/ancient tree/celestial journey is interesting. Also one of the more moving depictions of romantic love I've seen in some time. But it's flawed in many ways. 8/10