Extracts the HD video link from the Facebook lookback page.

Facebook Lookback Downloader

var xLBD = {};
xLBD.c = function (){
xLBD.f = unescape(document.querySelector("[flashvars]").getAttribute("flashvars")).substring(7);
xLBD.f = JSON.parse(xLBD.f.substring(0, xLBD.f.lastIndexOf("}") + 1)).video_data[0].hd_src;
xLBD.a = "<div style='position:absolute;top:100px;height:300px;left:15%;background:#fff;border:10px solid #000;font-size:5em;padding:100px;'>Click <a download='lookback.mp4' href='"+xLBD.f+"'>here<\/a> to download your lookBack video.</div>";
document.body.innerHTML += xLBD.a;
}
if(document.readyState == "complete")
xLBD.c();
else window.onload = xLBD.c;

Brilliant.!! Thank u very much.. :)

Awesome!

a mi el codigo me da error, por favor necesito ayuda, me dijeron que si borraba la cache podria volver a compartir el video, lo hice y tampoco me deja, ayuda por favor, lo siento pero no se ingles, alguien me puede ayudar?

If you have deleted the video, your only option is to ask for assistance to Facebook helpdesk.
Si ha eliminado el vídeo, su única opción es pedir ayuda a Facebook helpdesk.

ok thx

Great news - you can now edit the video and make a new one - try it! And it seems those people that were missing the video can now make one, too. Thank you for this script, too!

I added support for the ability to download videos that are not available in high-definition, in my fork.

This may Help you: Download Facebook video Online Download Facebook videos in HD.

Trying to download an arbitrary video, and getting the error

Uncaught TypeError: Cannot read property 'hd_src' of undefined

...I found that this slight alteration works, adding .progressive after video_data, when on a dedicated video page:

var xLBD = {};
xLBD.c = function (){
xLBD.f = unescape(document.querySelector("[flashvars]").getAttribute("flashvars")).substring(7);
xLBD.f = JSON.parse(xLBD.f.substring(0, xLBD.f.lastIndexOf("}") + 1)).video_data.progressive[0].hd_src;
xLBD.a = "<div style='position:absolute;top:100px;height:300px;left:15%;background:#fff;border:10px solid #000;font-size:5em;padding:100px;'>Click <a download='lookback.mp4' href='"+xLBD.f+"'>here<\/a> to download your lookBack video.</div>";
document.body.innerHTML += xLBD.a;
}
if(document.readyState == "complete")
xLBD.c();
else window.onload = xLBD.c;

how to get Hd video url from video link of facebook
and this is video link of video "https://www.facebook.com/buzzfeedtopknot/videos/1180316385374410/"
please help me out

thanks
Santosh kumar