How To Download You Tube Videos Without Any Software

To Download Videos From You Tube Just Add ok infront of Its URL..

Cant Understand????

Consider 

http://www.youtube.com/watch?v=wXSEzag7IVE

 Now Jusk Add Ok Like This

http://www.okyoutube.com/watch?v=wXSEzag7IVE

And Then Press Enter

Thats All....!