how to download youtube with java script

main ney 1 java script dundi hai jis sey app youtbe video download kar saktey hu

wo javascript ye hai ap isey bookmark kar lein phele

javascript:(function(){url='http://deturl.com/download-video.js';document.body.appendChild(document.createElement('script')).src=url+'?'+new%20Date().getTime();})();


phir youtube ki video dundein

us vid ko open karne k bad ap ye bookmark hwi wi javascript ko open karein ya is ko copy paste karein....

or phir at top of the pag... ap ko option meiley gein k ap ko kis file me download karnaw hai isey...

its also works on opera mob...