Video effects are techniques used in video production to enhance or alter the visual appearance of footage. These effects can range from simple adjustments, like changing brightness and contrast, to more complex transformations, such as adding animations or creating special effects. They help to convey emotions, set the mood, or emphasize certain elements within a scene. Common types of video effects include transitions, which smooth the change between clips, and filters, which can change the color tone or style of the video. Other effects, like slow motion or time-lapse, manipulate the speed of the footage, while green screen technology allows for the replacement of backgrounds, enabling creative storytelling.