A "video source" refers to any device or medium that produces or provides video content. This can include devices like cameras, smartphones, and computers, as well as platforms such as streaming services or DVD players. The video source is responsible for capturing, storing, or transmitting video signals. In a broader context, video sources can be categorized into analog and digital formats. Analog sources include traditional television broadcasts and VHS tapes, while digital sources encompass Blu-ray discs, online videos, and video files. Each type of video source has its own method of delivering content to viewers.