cannot download https://www.youtube.com/watch?v=P82UmJcCjJE

Hello, in order to help you better I need the following information.

Please, let me know me the name and version of your browser and version of the extension, all can be found using the following link: http://en.savefrom.net/user.php?info=1

Please, give us some more details regarding this problem (no download button, the button is not clickable, button is calling, but nothing happens).