This is a beautiful video of what maybe the last of the billboard painters.
Hand-painted billboards first appeared in the USA in the 1950s and are still seen in some parts of the USA especially in LA where they are often used to promote a new movie.
The Red Army in China used them to err motivate citizens and they are still a common sight in parts of South East Asia and India. However the quality leaves a lot to be desired and may not compare to these American billboards.
Thanks to these guys for the heads up on this video.