There is a fair number of online applications that aim to make the experience of using YouTube a more realized one. Preeminently among them are the tools for capturing and converting video files stored at the popular hosting service. The one we are discussing right now falls squarely into that category.
In general terms, all you have to do is cut and paste the corresponding YouTube URL into the provided box and hit the “Convert & Download” button. It is really as easy as that. There is not a lot to worry about, but there is not a lot to configure either. In a certain sense, I guess that is the idea of the site. And the one aspect that can be modified is actually the one that should not be bypassed, namely the file extension. This is important if only because it will enable you to rest assured the converted file will be viewable in different setups (like PCs and Macs) and devices (like iPods and iPhones).
At the end of the day, it is always nice to know that there are free services like this one available on the WWW. You always end up needing them when least expected, and that is a fact.