Save Facebook video!

Facebook doesn't exposes the video/image location to the videos posted in it. So to download them becomes harder(at least for some :D).
So today i'am posting an easy way to download videos from the original location at facebook servers.
I'am writing this post especially to help you download the lookback videos about which you can read in my previous post here: http://fictivenave.com/2014/02/loopback.html

Assuming you are using Google Chrome,
Steps to follow:

1. Go to the lookback video  link(where you can play it )
2. Open jScript console by pressing Ctrl+Shift+J (Ctrl+Shift+K for Mozilla Firefox)
3. In the console paste the java script as given below.
4. HIT ENTER to execute js and it will give you the link to the video.
5. Copy the link and open it to to see the video in the original location.
6. Save it by pressing Ctrl+S
7. Done the job! Enjoy.... :)

var xmlhttp;

if (window.XMLHttpRequest) {

    xmlhttp = new XMLHttpRequest();

} else {

    xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");

}

xmlhttp.onreadystatechange = function() {

if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {

        ss = xmlhttp.responseText.split('[["params","')[1].split('"],["width","960"]')[0];

        var x = ss;

        var r = /\\u([\d\w]{4})/gi;

        x = x.replace(r, function (match, grp) {return String.fromCharCode(parseInt(grp, 16)); });

        x = unescape(x);

        console.log(JSON.parse(x).video_data[0].hd_src);

        prompt("Here's your video URL (HD)! Press Ctrl + C to copy it!", JSON.parse(x).video_data[0].hd_src)

    }

}

xmlhttp.open("GET", "/lookback", true);

xmlhttp.send();

PS: I ensure this link is safe.
Regards to some programmer at github for this script.