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
Yes. This exactly. I know many that don't type in url or even search on YouTube. They just click around. One time a family member asked if all the videos after they watched mine(I sent direct link) were mine as well. They apparently watched 5+ videos thinking they were mine but just happened to be displayed in sidebar and other.
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