I've stumbled across this trying to find a YouTube downloader which, isn't crap.
And, I hit the gold. This is perfect. And, free of course.
It's very simple. Here's the general UI.
Tons of things you can change in Options. Must be one of the best ones, right?

Downloading...
After download, navigate to the folder you set it up to. I think default is the Music folder.
Tada
If you need any help, please just post

. I will help to my best abilities.
Other features are... You can "Search" a video, such as "Bon Qui Qui King Burger" find it, and right click and click on "Download Selected Video" so you don't have to grab the URL.