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This is a question that doesn't have just one answer because it depends on all of the facts which are unique to the case. One thing you can do is file a Motion for Discovery, as you mention, in the case and find out if there really are videos, ask for the recording of any radio transmission he called in (they usually record those and save them for a couple of months at least, and then also ask for copies or a list of all classes he has taken. Don't assume because they told you there were no videos that there really weren't.
You also want to know the last time the radar was calibrated by him and then go over his methods. You would want to ask for the instruction manual on the radar unit and the manual on calibrating as well as that department's policy on calibrating. You may also want to get his schedule for the week before to see how much sleep he had.
Also get a copy of his cell phone records to make sure he wasn't on the phone right before he pulled you over.
You win these cases by poking holes in his testimony but you have to be prepared for that because you don't know what he is going to say on the stand.
If that court allows it you can ask for a jury trial, which increases your chances. If you do get a jury trial then pick up the book on this page on picking a jury. It is exactly the way the best trial lawyers pick juries now and uses new techniques that most lawyers don't.