I'm trying to find a physical copy of Rainbow War - eviltoast

When I was 7, our class was brought to a neighboring elementary school to watch a projection of a short movie. It was about different nations of different colors, one blue, one yellow, and one red. Something happened and they all went to war against each other trying to paint each other with their own nation’s color. This movie was incredible and really left a mark in my memory.

I only found it recently. It’s called Rainbow War. I’m trying to find a physical copy of it, or even a digital copy if possible. The only place I could find it was on Amazon for nearly 100$ CAD. That seems excessive for a short film. Would anyone know of any other source to purchase it or, heck, even download it?