OK, have had more time to think about this brilliant video, this time from a Jungian perspective.
In Jungian psychology this dark Adam would be called the shadow or "shadow aspect". The shadow is almost the same as Freud's concept of the unconscious mind. The shadow personifies everything that the subject refuses to acknowledge about himself.
Like in the video, the less aware a person (light Adam) is of his own shadow side, the darker the shadow side is and/or becomes. Ignore the shadow at your own risk and the risk of those around you.
However, Jung also believed that the shadow is the seat of creativity and for some, this shadow side represents a persons true life spirit. Again, ignore at your own risk.
"Some Jungians maintain that 'The shadow contains, besides the personal shadow, the shadow of society ... fed by the neglected and repressed collective values'" - wikipedia
In Jungian psychology, the process of individuation and true personal growth involves the dissolution of ones "persona" and the facing of ones own shadow side. If and when 'an individual makes an attempt to see his shadow, he becomes aware of (and often ashamed of) those qualities and impulses he denies in himself but can plainly see in others — such things as egotism, selfishness. This period of growth into a fuller personal authenticity is quite painful.
When one starts to face one's shadow side one also is in danger of falling victim to the shadow, the blackness and the sense of inferiority.
Great courage and strength are required to face ones shadow self and go through the process of individuation.
What is interesting about this video is that the shadow reaches out to the conscious self. According to Jung for individuation to work, the conscious self has to be the one to reach out to the shadow/unconscious, not the other way around. Otherwise the conscious actually becomes the slave of the shadow.
So according to Jung, this video would imply that conscious Adam has become the slave of his shadow.
To truly assimilate the shadow we must become aware of and understand the shadow but not identify with it. We must not think that the shadow is who we are. If we think the shadow is who we are we can fall into depression and darkness.
Reincorporating the shadow into our personality gives us strength and a wider consciousness. Integration of the shadow is the first step in individuation. Full individuation means a recognition of the anima for men and the animus for women.
Recognition of the shadow is a continuous process throughout ones life. Shadows are not easy to accept.