youtube-dl is a command-line utility for downloading videos or extracting audio files from streaming websites such as YouTube, Dailymotion, and Vimeo. Developed by Ricardo Garcia Gonzales
License: Open Source
YouTube-dl is a robust command-line tool suited for advanced users looking for extensive customization and features, while Download Videos! offers a more accessible, user-friendly GUI for casual users. The choice between the two largely depends on the user's technical expertise and specific downloading needs.