Download Youtube Videos Without Any Software

First Step Open Youtube And Copy Video Url.. Like....
http://www.youtube.com/watch?feature=player_detailpage&v=aYAOQGkE7AM

Second Step 
Cut  this address  http://www.

Third Step
Type--   SS
like

ssyoutube.com/watch?feature=player_detailpage&v=aYAOQGkE7AM