Does not directly download. Redirects to a site (catch.tube) which contains a bunch of product ads and a URL field for entering the video you want to download. It then pops up the video in a new window for you to view or save (if you know to right click and choose save-as or use your File/Save-as option). Is functional with many resolution options. One-star because unsolicited display ads are forced on user. Uninstalled. How it has 8k users [fake??] and 'YouTube Download Button' {much better} only has 2k is anyone's guess.