They haven't hijacked that, it's their turn to chair it. The core members of that council take turns to do that.
You do realise that the key reason for that council to exist is so that nuclear armed powers talk to each other, right? However much we may disapprove of Russia's wartime policies, the council is doing its job so long as there's neutral ground where everyone else can talk to them about it rather than getting itchy trigger fingers
I was about to dismiss that out of hand, presuming you just didn't know the film, but I think you're right. His face is too wide, and the hairline doesn't match the original footage.
I'm simultaneously impressed by a pretty slick edit, and bewildered that anyone would put in the effort
Edit: and now I look like an idiot, because OP swapped the gif for a original. I swear guys, it was uncanny