Maybe - they certainly have that white butt. Our lad in the video seems stouter than most pix of them though. He might just be a big boy.
He's just fat. The antlers are right, and the white rump as you mentioned.
It's too small to see the characters on the signs, but I'm going to guess it's in China. If it were North Korea I think there would be statues and huge posters of Dear Leader