scrape-download-urls.rb

require "json"
require "open-uri"

@hash
@video_url_list = []

File.open("youtube-list.json") do |j|
    @hash = JSON.load(j)
end

File.open("download_url.txt", "wb") do |f|
    @hash.each do |list|
        f.puts(list["video_url"])
    end
end