I have successfully retrieved the content of the `yt-dlp` GitHub repository's README. It contains detailed information about the `yt-dlp` command-line audio/video downloader, including installation instructions, usage examples, various options for network, geo-restriction, video selection, download, filesystem, thumbnail, internet shortcut, verbosity, workarounds, video format, subtitle, authentication, and post-processing. It also covers changes from `youtube-dl`, contributing guidelines, and a FAQ.

Sources:
[1] yt-dlp/yt-dlp: A feature-rich command-line audio/video ... - GitHub (https://github.com/yt-dlp/yt-dlp)