Download Youtube Videos In Mobile/Pc (Any Formates)

To Download Youtube videos 
Just remove 'm.' 
Or 'www.' From video url and add 'ss' infront of it and
enjoy downloading video in differnt qualites..
Example in Mobile : http:// m.youtube.com/watch?v=0LrT8N02vys 
Remove m. & Add ss http://ssyoutube.com/watch? v=0LrT8N02vys EG 
in PC : http://www.youtube.com/ watch?v=0LrT8N02vys 
Remove www. & Add ss http://ssyoutube.com/watch? v=0LrT8N02vys 
Choose 3gp 240p,flv 240p,flv 360p,mp4 360p,mp4 460p,mp4720p etc .. Thank you..