Well, there are lots of ways people interact with browsers; that was just an example. Personally I don't type "google.com", "youtube.com" either, I use Conkeror's web shortcuts.

Still, the point is that it's not much different than running a commandline, e.g. something like:

- Click Gnome Do icon

- type "youtube-dl " and paste URL

- Click the "run" suggestion

- Click on Home launcher

- Watch filename until ".f123." bit disappears from the extension