I was involved in a small accident and given a citation. I plan to go to court to fight the citation.

I had a dashboard mounted video camera which captured the whole incidence. I want to use the first 2 minutes of video to challenge the cops claim. However, I don't want to show the remaining 3 minutes of video because it could potentially hurt my defense.

So if I show the first 2 minutes video in court, can the judge or cop demand to see the rest? if they do, can I refuse or just simply say I have erased the rest?

Thank you.