Change the color by adjusting the voltage of a small electrical current sent through the vehicles bodywork.
Although this particular video may not be real, the phenomenon it displays is a somewhat plausible one.
Back in 2007, motoring publications reported that Nissan had developed a process for applying a polymer coating (referred to as ‘paramagnetic’ paint) to automobile exteriors that could instantly change the perceived color of the car to any desired hue through the application of electrical current:
Before the vehicle is painted, a special polymer containing the special ‘paramagnetic’ iron oxide particles is applied to the car’s body. An applied electric current then adjusts the spacing of small crystals within the iron oxide particles and therefore affects their ability to reflect light and change color.
As far as we know, neither Nissan nor any other major automobile manufacturer has yet offered ‘paramagnetic’ paint as an available feature on a production-line vehicle, but the days of color-changing cars like the one shown in this video may not be so far off.