Problems with video showing Green Screen

 I wanted to make a video as an addition to my project, not as a part of it, just to show how it would work. I sadly did not do it, as because of my forgetfulness and excitement about the photoshoot I simply forgot. I wanted to make this video the next day, but my model was unavailable, and when she was, the whole day there was a storm. I gave up on this idea, but the kimono is still green and would work. As a presentation of the 'prototype' green screen, I edited a photo I took to make the clothing different colours. I did it by selecting by colour and then excluding the grass. This is the result. It is not 

amazing work, but it at least shows that it does work.