how to download any video from YouTube in any mobile without any app? and why not use youtube's offline mode.?

1) First go to youtube.
2) click here

to go right from here.
3) Now search that video which you want to download.
4) Now go to video URL.
5) In the URL you will see that i choose this link https://www.youtube.com/watch?v=PzElgYpDmtw link is given.

6) Now just add ss before YouTube.

Ex- https://www.ssyoutube.com/watch?v=PzElgYpDmtw/video link

7)Now a new web page (Save from net) will be open.

8) Now download your video in any quality you want.

and second method is  copy the video url

 and paste it on  savefrom.net Thanks for reading

t note:- if you download video in the form of
 offline mode then you should know about that you
 can'T download the  video you have download the catches
 which is valid for 24 hour and after 24 hour
 you have sync 
your data . 
if you not do it then the video is not play again.