"Video" refers to the electronic medium for recording, copying, playback, broadcasting, and displaying moving visual content. It combines a sequence of images (frames) with synchronized audio to create a dynamic multimedia experience. Videos are widely used in entertainment, education, marketing, communication, and surveillance. Formats range from analog (e.g., VHS) to digital (e.g., MP4, AVI), with resolutions spanning SD to 8K. Streaming platforms like YouTube and Netflix have revolutionized video consumption, enabling on-demand access. Advances in compression (e.g., H.265) and AI-enhanced editing further expand its applications. As a dominant form of modern media, video continues to shape global culture, information sharing, and storytelling.