Not to me it's not.Really hard to imagine a video that's 5x worse than Ray Rice. Did he beat up a paraplegic or something?
Don't confuse this with me saying what Rice did was ok but he got provoked to some degree, lost his cool and took a single swing. A single split second heat of the moment bad decision on his part. That's obviously bad and I'd add that when he and his wife watch that video I somehow think he has to explain his actions afterwards to her more than the punch itself.
But some idea's of of something worse would be someone throwing multiple punches, someone continuing to beat on someone who was down, someone being caught on video more than once beating on someone. These things are all worse than a single split second swing because they all seem to indicate behavior more severe than someone losing their cool for a split second.