linux Mint 14 como bajar videos de youtube y / o convertirlos MP3 desde consola Terminal

Primero respasar estos pasos en la consola  

sudo apt-get install ffmpeg libavformat-extra-53

sudo add-apt-repository ppa:nilarimogard/webupd8

sudo apt-get update
sudo apt-get install youtube-dl

Para musca en formato  MP3 :

youtube-dl URLDELVIDEO --extract-audio --audio-format mp3 (o cualquier otro formato) -t

Para bajar  video  completo  :

youtube-dl options url  del video    

Ayuda de youtube-dl : youtube-dl - -help

En rojo alguna de las opciones mas interesantes ___:

Usage: youtube-dl [options] url [url...]

Options:

  General Options:

    -h, --help               print this help text and exit

    --version                print program version and exit

    -U, --update             update this program to latest version

    -i, --ignore-errors      continue on download errors

    -r, --rate-limit LIMIT   download rate limit (e.g. 50k or 44.6m)

    -R, --retries RETRIES    number of retries (default is 10)

    --dump-user-agent        display the current browser identification

    --list-extractors        List all supported extractors and the URLs they would handle

  Video Selection:

    --playlist-start NUMBER  playlist video to start at (default is 1)

    --playlist-end NUMBER    playlist video to end at (default is last)

    --match-title REGEX      download only matching titles (regex or caseless sub-string)

    --reject-title REGEX     skip download for matching titles (regex or caseless sub-

                             string)

    --max-downloads NUMBER   Abort after downloading NUMBER files

  Filesystem Options:

    -t, --title              use title in file name

    -l, --literal            use literal title in file name

    -A, --auto-number        number downloaded files starting from 00000

    -o, --output TEMPLATE    output filename template. Use %(stitle)s to get the title,

                             %(uploader)s for the uploader name, %(autonumber)s to get an

                             automatically incremented number, %(ext)s for the filename

                             extension, %(upload_date)s for the upload date (YYYYMMDD), and

                             %% for a literal percent. Use - to output to stdout.

    -a, --batch-file FILE    file containing URLs to download ('-' for stdin)

    -w, --no-overwrites      do not overwrite files

    -c, --continue           resume partially downloaded files

    --no-continue            do not resume partially downloaded files (restart from

                             beginning)

    --cookies FILE           file to read cookies from and dump cookie jar in

    --no-part                do not use .part files

    --no-mtime               do not use the Last-modified header to set the file

                             modification time

    --write-description      write video description to a .description file

    --write-info-json        write video metadata to a .info.json file

  Verbosity / Simulation Options:

    -q, --quiet              activates quiet mode

    -s, --simulate           do not download the video and do not write anything to disk

    --skip-download          do not download the video

    -g, --get-url            simulate, quiet but print URL

    -e, --get-title          simulate, quiet but print title

    --get-thumbnail          simulate, quiet but print thumbnail URL

    --get-description        simulate, quiet but print video description

    --get-filename           simulate, quiet but print output filename

    --get-format             simulate, quiet but print output format

    --no-progress            do not print progress bar

    --console-title          display progress in console titlebar

    -v, --verbose            print various debugging information

  Video Format Options:

    -f, --format FORMAT      video format code

    --all-formats            download all available video formats

    --prefer-free-formats    prefer free video formats unless a specific one is requested

    --max-quality FORMAT     highest quality format to download

    -F, --list-formats       list all available formats (currently youtube only)

    --write-srt              write video closed captions to a .srt file (currently youtube

                             only)

    --srt-lang LANG          language of the closed captions to download (optional) use IETF

                             language tags like 'en'

  Authentication Options:

    -u, --username USERNAME  account username

    -p, --password PASSWORD  account password

    -n, --netrc              use .netrc authentication data

  Post-processing Options:

    --extract-audio          convert video files to audio-only files (requires ffmpeg or

                             avconv and ffprobe or avprobe)

    --audio-format FORMAT    "best", "aac", "vorbis", "mp3", "m4a", or "wav"; best by

                             default

    --audio-quality QUALITY  ffmpeg/avconv audio bitrate specification, 128k by default

    -k, --keep-video         keeps the video file on disk after the post-processing; the

                             video is erased by default