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sudo apt-get update
sudo apt-get install apt-transport-https ca-certificates
sudo apt-key adv --keyserver hkp://ha.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D
echo "deb https://apt.dockerproject.org/repo ubuntu-xenial main" | sudo tee /etc/apt/sources.list.d/docker.list
sudo apt-get update
apt-cache policy docker-engine
sudo apt-get update
sudo apt-get install linux-image-extra-$(uname -r) linux-image-extra-virtual
sudo apt-get update
sudo apt-get install docker-engine

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// Generates a URL-friendly "slug" from a provided string.
// For example: "This Is Great!!!" transforms into "this-is-great"
function generateSlug (value) {
  // 1) convert to lowercase
  // 2) remove dashes and pluses
  // 3) replace spaces with dashes
  // 4) remove everything but alphanumeric characters and dashes
  return value.toLowerCase().replace(/-+/g, '').replace(/\s+/g, '-').replace(/[^a-z0-9-]/g, '');
};

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Download Udemy course videos using youtube-dl

$ youtube-dl --list-extractors | grep udemy

Steps

1. Get link to the course to download. e.g. https://www.udemy.com/course-name/
2. Login into udemy website, save the cookie from chrome using Chrome (Cookie.txt)[1] export extension. Save it to file udemy-cookies.txt
3. Get the link of the video that you want to download. usually in format. Use the command provided below where you have to replace the {course_link} and {path_to_cookies_file} with respective paths.

# $ youtube-dl {course_link} --cookies {path_to_cookies_file}

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# Original project https://github.com/alexisrozhkov/extract_media_from_backup

import os
import shutil
import sqlite3
import argparse


# http://stackoverflow.com/questions/12517451/python-automatically-creating-directories-with-file-output
def copy_file_create_subdirs(src_file, dst_file):