At the end the clouds look trembling. That is caused by the software that stitches the images of two cameras together. It doesn't know how to handle the moving clouds during the decisions on where to lay the best transit line between the images. Also the flashing brightness of the sky is by influence of the software. This is done image by image 1600 times over. The short white flashes in the foreground are peoples flashlights.
This is the appearance that most people get to see. Not green but grey to the naked eye let alone other colours.