The video shows a series of images of neurons, which are the fundamental units of the nervous system. The neurons are depicted in a blue color with a pink nucleus, and they are connected by dendrites. The video zooms in on the neurons, highlighting the intricate network of connections between them. The background is dark, which contrasts with the brightly colored neurons, making them stand out. There are also small white dots scattered throughout the video, which could represent other cells or particles in the nervous system.