complicated i think this addon is very simple and very good just click download

https://addons.mozilla.org/en-US/firefox/addon/simpl-youtube-video-downloader/

даже кнопка не активна!

The plugin does not allow downloading of HD videos even in 720p. Don't waste time using it. Only option visible is of 360p! not even close to HD.

it's a good application.....

dosen't work

This downloader doesn't work