Take over the README's guides: yt-dlp options, output templates, cookies, sending links, built-in HTTPS; add a sidebar The README now keeps only the quick start and the environment variable reference. Its explanatory sections move here, the FAQ gains the ALLOW_PRIVATE_ADDRESSES detail, and links that pointed at README anchors now point at these pages. The YTDL_OPTIONS Cookbook's "What MeTube already sets for you" follows the new Tags choice for audio: which postprocessors each choice adds, and Tags as the way to leave out cover art instead of writethumbnail.