A Teaspoon of Video

Computer Science education expert Mark Guzdial suggests kids can learn effectively from Task-Specific Programming (TSP, or "teaspoon") languages that can be learned in a few minutes, teaching one idea from theoretical CS (the medicine?) in the context of a motivational and interesting automation task (like a teaspoon of sugar to help it go down). Your job is to create one of these educational languages, that teaches an important computing concept in a form relevant to processing social media video.