youtube-dl is a powerful command-line utility that lets you download videos from YouTube and over 1000 other video platforms. Built as an open-source project, it works across Windows, macOS, and Linux without requiring platform-specific installation.

Key capabilities include:

Flexible downloading: Grab individual videos, entire playlists, or specific video ranges from your favorite sites
Quality and format control: Choose video resolution, audio quality, and output format to match your needs
Subtitle support: Automatically download and embed subtitles in multiple languages
Live stream recording: Capture live broadcasts as they happen
Format conversion: Convert downloaded videos to different formats like MP4, WebM, or audio-only files
Advanced networking: Configure proxies, set rate limits, handle authentication for private videos, and bypass geographic restrictions
Batch operations: Process multiple URLs at once with error handling options

The tool requires Python 2.6+ or 3.2+ and can be installed via curl, pip, Homebrew, or direct download. Its command-line interface offers extensive options for customizing output filenames, managing playlists, and controlling download behavior. For users seeking continued development, yt-dlp is available as an actively maintained fork with additional features.