How to download youtube videos without any software

Hi here i am explain how to download videos without any third party software.

1.Goto https://www.youtube.com/?gl=IN

2.Search which video you want

3.Open your video,Now your video is playing

4.Now the url is like this eg:https://www.youtube.com/watch?v=ae_DKNwK_ms

5.Just add "ss" before youtube eg:https://www.ssyoutube.com/watch?v=ae_DKNwK_ms

6.Browse it now you can directly save the video with 240/360/480/720/1080p as your wish