This visualization presents a curated reference card for youtube-dl, a command-line tool for downloading videos and audio. It shows the tool’s core commands and options in two grouped tables, distinguishing general playback controls from file-handling and audio-conversion flags. The layout uses plain Markdown tables to organize the API syntax, with option names and their descriptions aligned for quick scanning. The example concludes with a composite command that combines `--batch-file`, `--audio-format mp3`, and `--embed-thumbnail` to demonstrate a complete workflow for downloading music with album art.