Yes. And if Officer Wilson had said "I will arrest you if you do not accept this summons", and if he made no other threats, then the cop is blameless here.
But - assuming the video here is legit - Wilson threatened the man with an illegal arrest. That's serious business. It's indefensible, and goes to the character of the cop.
By the way, I'm guessing Wilson probably did say something along the lines of "I will arrest you if you do not accept this summons". But that was probably cut out of the video. The video taker probably doesn't have clean hands either.
Wilson telling him, “Do (or don’t do) this, or I’ll arrest you” is not an illegal arrest, because Wilson already had the grounds to arrest the guy based on the various summons Arman had already ignored. An illegal arrest is an arrest with no grounds; Wilson had grounds for arrest, but he wasn’t necessarily going to go that far if he didn’t think it necessary.
Best I can tell Wilson did not break any laws in arresting this guy. A lot of cops believe that videotaping cops is illegal due to wiretapping laws, and Wilson may be one of them, but since that wasn’t why Arman was arrested it’s beside the point.