[greenyoda]

The infringement claim is probably due to an error made by an automated scanning tool. If you file a counter notification stating that you are the copyright holder (the video is your own work, you've never assigned the copyright to anybody else), the other party will have to prove that they own the copyright, which they can't. It's doubtful that it will ever end up in court - a human will review the video, determine the infringement claim was erroneous, and withdraw the claim (probably without offering any apology).