He's one of the 2 Lesser Evils that took charge of the Burning Hells after the Prime Evils (Diablo, etc) were banished to Sanctuary. Since the video takes place on Sanctuary, it shows that Azmodan (and probably Belial too) have come to Sanctuary.
Assuming the Prime Evils are still here somewhere, that would bring the list of epic super-powerful demons that are on Sanctuary to: Diablo, Mephisto, Baal, Azmodan, and Belial
...at least.
This lines up with the data-mined speculation that Belial is a boss in Act 2 (codenamed Saddle) and that Azmodan is a boss in Act 3 (codenamed Fetlock).
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Since DiabloFans doesn't take their spoiler stuff seriously (as demonstrated by their last cast), here's the breakdown:
So the guy in the still (and therefore the video it's from) is Azmodan:
http://diablo.wikia.com/wiki/Azmodan
He's one of the 2 Lesser Evils that took charge of the Burning Hells after the Prime Evils (Diablo, etc) were banished to Sanctuary. Since the video takes place on Sanctuary, it shows that Azmodan (and probably Belial too) have come to Sanctuary.
Assuming the Prime Evils are still here somewhere, that would bring the list of epic super-powerful demons that are on Sanctuary to: Diablo, Mephisto, Baal, Azmodan, and Belial
...at least.
This lines up with the data-mined speculation that Belial is a boss in Act 2 (codenamed Saddle) and that Azmodan is a boss in Act 3 (codenamed Fetlock).
Ask..and more can be covered.