Oh, yeah. I put the UV part in there because of the talk about full color printing. The first time through that video I missed the key phrase "could in the future"[1].
Well, I'd assume white counts as a color, as well as other light colors. Plus they then go on to talk about printing clear things. You need to absorb energy from somewhere so I figured UV was about all that was left.
[1] https://www.youtube.com/watch?v=VXntl3ff5tc&t=3m27s