This color changing technology is brought to you by Chromostone.com. The concrete is called Chronos Chromos concrete that is able to systematically display numbers, letters, patterns, and colors in it.
Concrete is usually considered very rigid or not flexible; it cannot be altered once made, so to display anything on it, one could only paint it or make further modifications around it.
However, with flexible concrete, it's easier for building and interior designers and you can do a lot with it. This Chronos Chromos concrete seems to offer flexible concrete technology.
The applications for the concrete can range from simple home applications to complex architectural patterns in buildings.
The video demonstrates a few basic examples of how the system works. The concrete has wires in it and when current is applied, the temperature of the concrete rises, changing colors or surface characteristics. This process means the concrete can actually display numbers and characters.