Dowload Youtube playlist videos, with node.js.

yt-playlist-dl.js

var youtube = require('youtube-feeds');
var fs = require('fs');
var ytdl = require('ytdl');
var slug = require('slug-component');
youtube.httpProtocol = 'http';

var videos = null;
youtube.feeds.playlist("PL8Mfzkj8FPJtepq2syn8nFKtOWdyPigE_",{} ,
	function( err, data ) {
    if( err instanceof Error ) {
        console.log( err )
    } else {
       var vid = "", url = "";
        for (v in data.items) {
        	
        	vid = data.items[v].video.id;
        	title = slug(data.items[v].video.title);
        	console.log(title);
        	
        	url = "http://www.youtube.com/watch?v=" + vid;
        	ytdl(url, { filter: function(format) { return format.container === 'mp4'; } })
  			.pipe(fs.createWriteStream(title + ".mp4"));
  			
        }
        
    }
}
);