I decided that I would watch one of my favorite movies-- Howl's Moving Castle, but instead of doing so like normal, I used my mac to invert the colors of the movie.
It completely changes the experience.
Unfortunately, I took screencaps, and when I inverted the screen back, they re-inverted, as well. It was poorly planned on my part. I don't have anything to re-invert them, so you can use paint on a PC or invert your mac to see what I saw.

You may even be able to repeat this experiment in a Windows computer using Paint. I know that if you take a screenshot of a movie and then open it in paint, when you play the movie, the screenshot in paint will update in real time, so that you effectively can watch a movie using the paint program. I never tried to see what would happen if you inverted the colors of the screenshot before you hit play. Let me know if any of you try it!!!