This is "video painting" a form of interactive graffiti.
Art duo Blake Shaw and Bruno Levy developed the technique using electronic paint rollers embedded with infrared lights. The lights within the paint rollers send tracking information to a computer, which then tells the projector where to project video.
The pair wanted to "reimagine street art with the moving image" and have painted dozens of buildings and landmarks across Europe.
You can see more of their video painting on their Vimeo Page.
Produced by David Ibekwe