Youtube-dl

A nice tool for downloading from youtube, various other video sites.

Documentation

github

https://github.com/ytdl-org/youtube-dl

Usage

youtube-dl ${YOUTUBE_URL}                           # download video, using defaults
youtube-dl -F ${YOUTUBE_URL}                        # list available video formats (not audio/video only formats)
youtube-dl -f 137 ${YOUTUBE_URL}                    # download a specific video format (if avail)
youtube-dl -f 'bestaudio+bestvideo' ${YOUTUBE_URL}  # get best video/audio quality separately, assemble them