If you've ever felt bear claws as I have, there would be little question.
Bear claws are like individual knives. With little muscular effort (as with a knife), those claws would *easily* would dig into you like butter.
A person would bleed heavily.
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Now that video is a joke.
If it's a real bear, then it is a *trained/"domesticated"* bear playing with his "friendly" trainer in karate costume. Bear behavior in aggression or defensive mode, is vicious. That bear looks friendly and is not doing anything antagonistic. The guy also is "hitting/pushing" *very* lightly. If you piss even a trained bear, that bear can lose itself in rage. It's just patty-play.
Now, I've seen realistic looking costumes that could fool you. This video could be fake as well.