I rate 4/5, because this is the best video downloader for any site out there. however, one problem that needs to be fixed, is that... when you watch a livestream through youtube, this plugin causes the video to stutter/buffer every few seconds and youtube becomes unwatchable. Every time i watch a live youtube stream, i have to disabled this addon for things to work normally. I've noticed that this add-on adds hundreds of items to the video download list during a youtube live stream, and believe this is what is causing the video problems.