its not likely that anyone's going to read an explanation before leaving their one-star review, but the author of this add-on is very much at the mercy of YOUTUBE ITSELF, which is likely to change their system ON A WHIM and with NO WARNING in ways which break any add-on which tries to work within the page. the author of this particular add-on has been extremely patient with youtube's shenanigans, and has always updated the add-on relatively quickly, just be patient.