Based on your facts, you have various legal actions you can take against this individual.
He has violated your trademark. Just make sure your trademark is still "live".
If he is copying and selling your video, he as committed copyright infringement
. However, to sue, your video copyright needs to be registered with the US copyright office.
If your copyright is not registered, it cost about $50 and you can easily do it yourself.
Link to US copyright office: http://www.copyright.gov/
Link to copyright forms: http://www.copyright.gov/forms/
There are other various causes of action you can file also. If you wish to press the issue legally, I would see a local Intellectual Property Attorney.
You can, without and attorney, server/mail him a cease and desist letter.
If he is selling over the internet (such as eBay or person web page), you can file a DMCA take down request.
Review information at this link (lots of other sources also)
Many paths to take. The least work for you is to hire an attorney to do the work. Such is also the most expensive.
If you have any additional questions, please come back and ask.