The video was first posted on Facebook in a slightly longer version than the above YouTube clip or versions floating around on Twitter. In it, the narrator sheds a little light on the situation but fails to adequately illuminate what the hell led to this moment.
"The buck roo sees the odds stacking against him and tries to get the dog with its claws one last time,” the narrator says, revealing nothing to everyone plopped into the middle of this episode. “Its powerful arms anchor the dog by the breastplate as Max doubles his efforts to escape. Finally, the 'roo switches his attention to ‘Donks’ and sizes up the human to be his next victim."
While there's little context available about the situation, it's amazing. Don't punch kangaroos, it's mean and you'll probably lose the ensuing bout. But this is amazing.