Sorry, but not very useful as it only presents a limited range of resolutions that are video & audio and theyre all either too low (360p) or too igh (720p+). Im used to being able to get 480p (perfect for me on limited data and mobile) which i usualyl get via IDM...currently im in Linux and if course no easy IDM downloads, so trying all Add Ons for youtube. And so far, all are so limited....this one is just weird, theres 1 page with limited video&ausio options and 2 pages of audio or video only options...bonkers....