best i've used Rated 4 out of 5 stars
I have used quite a few youtube downloaders and this one even with it's annoying parts is the best.
Just don't download the video converter because they want you to buy it and it looks like crap. Use the miro video converter instead for that. It downloads just fine.
I suggest mp4 format. That format is widely used, easy to work with and very small as in how much hd space it takes up.
I'm surprised because we do not ask our users to download a video converter or to buy something similar... it seems that you are using a forked version of our add-on, so can you tell me where you have downloaded it please?