How to Download Youtube Videos?
1. Open the Youtube video in your browser.
2. Open a notepad & copy and paste the url written in the browsers address bar into it. 
3. Wait for a while till it start playing(or buffering).
4. Now right click in an empty space & select view source(it may be at different place in different browsers other than chrome & IE). 
5. In notepad, write get_video in place of watch
6. Write video_id in place of v
7. Now, delete all the words after & and in place of them write t= in the notepad.
8. Now, in view source page, press Ctrl+F and write “t” with quotes and press Enter. 
9. Now,copy the long code written in b/w “ and %3D and paste it into notepad after t=
10. See Below in picture
11. Write =& at the END
12. Now,copy and paste this url in the browser’s address bar and hit Enter
This will download video in Flv format.
13. To Download it in high quality Mp4 put fmt=18
14. To Download video in mobile friendly 3Gp format, put fmt=17 for 3Gp High Quality ‘or’ fmt=13 for 3Gp Low Quality.
15. Done
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