That's a fair question. The video shows (or appears to show) the man standing on a street corner, doing nothing wrong.
But the news article says that the man was "taunting" the police. What does that even mean? Why were no details of that given?
And remember, unless it was altered, the video is neutral. But the news article is reporting what the police told them. Not so neutral.
Speaking of neutral, I suppose I'm not looking at this neutrally myself. But I'm tired of police excesses, of cops shooting dogs, old men, and mentally challenged folks.
Cops need to start thinking less like "law enforcement officers" and more like "peace officers."
There is another video.