A video file is a digital file that contains moving images and sound, allowing users to watch videos on various devices. These files can be stored in different formats, such as MP4, AVI, or MOV, each with its own characteristics and compatibility with media players. Video files can be created using cameras, smartphones, or software applications that capture and edit video content. They are commonly used for entertainment, education, and communication, making it easy to share visual information across the internet or through physical storage devices like USB drives and DVDs.