Ok...seen the clip over and over. From the news report on the tv, I'm figuring this scene happens during the first of the 3rd act of the film. Joker's rampage with the bridge and barges and boats and blah blah blah is taking place since Harvey's "dead", Joker knows Dent isn't Batman....which is why of course the barge thing happens.
With that said, and what the clip means...it's HARVEY talking (more or less). He answers to the name Harvey. What's in the voice? Take into account, that Dent's just been in an accident, at this point even his Normal voice wouldn't sound the same. It's a bit different, but not by much.
As far as I can tell, the Two Face personality hasn't been revealed yet. Though, the face...I can tell that the leaked photo was no B.S. Look closely and you'll see the missing cheek skin. And for those of you who are asking if the shot of alcohol would leak though that, it wouldn't. If you drink, you know what I mean. It would go directly back into his throat...which in itself would be hard to imagin seeing as how he was scarred and all. But it also would made a lot of sense as to why he needs a drink. haha
I'm getting that twisted hangman storyline feeling going on from Dark Victory in this clip. Two-Face is out for justice, and the crooked cops have to pay.
Anyways...that's my ...um..two cents worth.