VLC is a free, open-source media player and multimedia engine that can play most media files, discs, streams, and devices, as well as convert, encode, and stream content in numerous formats. It is part of the VideoLAN project and is used by millions worldwide across various platforms, including Windows, macOS, Linux, Android, and iOS. The project is maintained by a community of volunteers and offers an embeddable engine, libVLC, for third-party applications.