I have seen the video posted on several blogs. I deeply and profoundly regret my reaction, and I apologize to all involved. Throughout my many years of service to the people of North Carolina, I have always tried to treat people from all viewpoints with respect. No matter how intrusive and partisan our politics can become, this does not justify a poor response. I have and I will always work to promote a civil public discourse.
The owner of the YouTube account that promoted the anonymous video hasn't responded to an inquiry about who filmed it. (Source)