Youtube download without a downloader

The simplest way to download your youtube video is by replacing the "WWW." with "ss"

For Example:

if your youtube link is https://www.youtube.com/watch?v=Ziypn8hVxMU&feature=g-all-u
then your download link will be https://ssyoutube.com/watch?v=Ziypn8hVxMU&feature=g-all-u

what this actually does is, take you to savefrom.net from where you can download your video.