The first is the concept art above, "a teaser for the Giant race of the Tuatha Dé Danann." The second is the video embedded below, which is a first-cut animation test for a Helbound, the game's death-flavored Viking healer class. "Neither the model nor the animation cycles are final yet," Jacobs warns. "In keeping with our intent to always show you folks truly representative models and not ridiculously high-poly count models that won't work for most gamers, this Helbound represents a pretty good approximation of how a Helbound could look in the game at launch."
[Many thanks to tipster Guinness!]