Notes:

He's playing as Ganondorf, by the way, and he was just goomba stomped by a skeletal dog on an elevator and killed itself… now this is the Dark Souls we've f------ dreamt of.

Source: TearofGrace's "Dark Souls 3 | THE UNKINDLED ONE IS BORN"

(video starts at the gif, 15:09)
The video contains gameplay spoilers, but not during that one scene in particular, at least. However, IMMEDIATELY AFTER is a boss fight, which might be spoilers for some.