How to download youtube video simple tricks|2017 |100% work

How to download youtube video simple tricks|2017 |100% work 

must watch and see tricks..
https://www.youtube.com/watch?v=r-s864WhsFE&t=5s
https://www.youtube.com/watch?v=r-s864WhsFE&t=5s
https://www.youtube.com/watch?v=r-s864WhsFE&t=5s
https://www.youtube.com/watch?v=r-s864WhsFE&t=5s

How to download youtube video simple tricks|2017 |100% work
How to download facebook video simple tricks|2017 |100% work
How to download any video video simple tricks|2017 |100% work

must watch and simple tricks