Linux: Download YouTube Videos

Install the youtube-dl script. With Ubuntu:

sudo apt-get install youtube-dl

Next, find the YouTube video you want to download and pass it to the script:

youtube-dl -b -t "http://www.youtube.com/watch?v=aEXFUbSbg1I"

Command-line options:

Usage: youtube-dl [options] video_url

Options:
  -h, --help            print this help text and exit
  -v, --version         print program version and exit
  -u USERNAME, --username=USERNAME
                        account username
  -p PASSWORD, --password=PASSWORD
                        account password
  -o FILE, --output=FILE
                        output video file name
  -q, --quiet           activates quiet mode
  -s, --simulate        do not download video
  -t, --title           use title in file name
  -l, --literal         use literal title in file name
  -n, --netrc           use .netrc authentication data
  -g, --get-url         print final video URL only
  -2, --title-too       used with -g, print title too
  -f FORMAT, --format=FORMAT
                        append &fmt=FORMAT to the URL
  -b, --best-quality    alias for -f 18

See also: youtube-dl Homepage