If you use a camera with night vision enabled, a human's eyes will appear to glow. It is just someone's eyes reflecting the light that is projected into the pupils and iris.
Wasn't scary at all to me.
That's pretty freaking awesome. Gotta be the fourth time we've watched it, though. And more than anything else, I feel sorry for the poor thing if it really is a fallen angel/demon. Because note that in most demon videos they don't willingly show themselves except to scare. But this poor guy looked scared himself, and tired.