How to make advanced HUD elements using new UI components?

I'm not exactly a Unity expert, but I've been working on my project for some time and have gotten around to making an HUD just now. The thing is, I'm a bit confused even on what I should be studying and learning. I can't seem to understand how to build custom HUD elements, like the ones seen in this video for example: hud video, using the UI components. Maybe the answer is that I'm not supposed to and that those UI elements aren't intended for these uses? Or maybe I'm just not seeing the connection and I can't seem to find any resources that will show me how it's done. Does anybody have any illuminating insight and/or tutorials/videos/guides to pass on?