simple, good. been using for a while. recently started getting "Download Failed" in Firefox when trying to download videos. It ended up being the DuckDuckGo Privacy Essentials add-on blocking the download. I have to disable DuckDuckGo Privacy essentials for YouTube to use this. Also have Privacy Badger Add-On and that one does NOT have to be disabled to use YouTube Downloader.
** Creator is a fraud! ** Download speed with this addon is about 64Kbyte per sec, when the same link downloaded with online downloaders have the download speed of 3Mbytes per second!!!!!!!!!!!!!! ** Creator is a fraud! **
Downloads are atrociously slow, like, 65kb/s slow. Others have complained about this app installing malware. I'm not bothering with this. The only reason I even tried was because my previous YouTube downloader stopped working.