How to Download Youtube video on your compuer or laptop 
1.First of all You need to download Internet download manager(IDM) from the bottom of the page
2.Then install it (then Restarte the pc)
3.Then Open your brouser then it will ask for permission to add IDM extension
click on add button. If idm doesn't ask you permission for extension for first time
you open browser You need to go to browser option or setting and click on 

extension and endable the idm extension.
4.Atfer that close the browser and open it again 
5.Now go to Youtube.com Search for the video you want to download and play 

the Video after opening video for a while You will see idm download bar click on
it and select the quality of video you want to download and hit the start button.
(It is faster then any other youtube downloader and it also can download 

video,games, Software from other website........
*************************Download IDM From this link********************************
>>>>>>>>To Download Youtube video in Android Phone Please check This page<<<<<<<<<<<<<
..................................... Enjoy Watching ..........................................................