The first photo is incorporating an object with light to abstract the object. I used a roll of paper lit from behind through the back. Giving the illusion of looking into the bottom of a tree the light abstracts the object making it unrecognizable.
The video is using the light to create an object. Lit with a projector behind the person, the light goes through a clear sheet to project an altered image on the wall. As she progresses in her work more and more tape is added blocking more light to create an increasing complex image.
This is incorporating a person into the light. The clear thick plastic affects the light and creates a rainbow pattern across the piece. The person is subtle but still there interacting with the light.