Only 360p! Otherwise they lead you to install a Chrome extension. I'm not interested to that because I can't even see a YT video in Chrome. Only Tor (Mozzilla based!).

I only rated 2 stars. It appears to be redirect. When you get redirected, it took me to downr.org but then on top of that, that site redirected me again and started an automatic download. I never requested a download. That alone means AVOID. So, I didn't even bother trying the tool itself because of it which is the only reason I didn't give it one.