I saw something relevant to a situation like this a few weeks ago. The defendant made a discovery request for the dash cam video, he allegedly rolled through a stop sign, claimed he did not to the officer and the officer stated he had it on video.
He asked that the ticket be dismissed based on the fact he did not receive the video. The prosecuting attorney stated that a video was not submitted as evidence and that the officer cited the individual based personally witnessing the violation.
The judge asked the guy if he had anything else as a defense and the guy said no. The judge denied the dismissal request and gave the defendant one of two options, accept the ticket with a reduced fine or a reduction to a non moving violation and pay the fine. He took option 2. The judge then asked the defendant why he did not subpeona the officer. He said he didn't think it would help. The judge said if the officer stated in court he made a statement about the video during stop, he would have dismissed the ticket.
If the officer does not submit the video for evidence, you may have the same issue on your hands. An advantage you may have is officers are required to appear in court in your state, they don't in mine.