This is a great addon. YouTube fights hard at covering up the truth by removing videos that divulge the truth. This addon allows us to capture videos before they are deleted to keep spreading the truth. This addons works perfectly for me. It is true the button disappeared for a while, but that was because of YouTube trying to keep the truth from getting out. YouTube, like other big tech, is owned by world elititst who want to control what information gets out. Addons like this one help in protecting the truth.