Paste the link of the youtube video you want to download(eg https://www.youtube.com/watch?v=_63WgvFvdE8) in the sites below
and the download link would be served to in seconds
http://keepvid.com
http://en.savefrom.net
and the download link would be served to in seconds
http://keepvid.com
http://en.savefrom.net