I checked the New Mexico Rules of Civil Procedure and it seems it's up to either party to request/demand discovery. Can't see any requirement that I volunteer it. But to be on the safe side I shall e-mail the defendants attorney and ask if he would like a copy of the videos and photos.While I don't practice in your state, generally you have to lay the foundation for admission of the video; you can't just get up and start showing the video. That means having someone with personal knowledge of the video (which might be you) testify about the relevance and the authenticity of the video before you show it and ask that it be admitted into evidence. Exactly what you need to do for this depends on the rules and practices of the courts in your state.
Also, have you checked to see if you must share the video with the defendant before the hearing or produce a list of planned exhibits, etc., that you intend to introduce? Some courts require that parties share some of that information before a hearing or trial.
If you fail to lay a proper foundation at the hearing or miss a step that the rules require in advance of the hearing you open the door for the defense to object to admission of your evidence, and if it does not get admitted the court cannot consider it.