My question involves traffic court in the State of: FLORIDA

I have a few questions pertaining to RADAR - its discrepancies and a few other various questions.

I have dash cam footage of an officer citing a driver and I would like to know if the fact that the officer was behind a stationary object at roughly a 30 degree angle to the road, if said stationary object would adversely affect the RADAR's reading, and if so, if that would be admissible and have any baring on the proceedings.

Also, I would like to know if there's an easy way to calculate a vehicle's speed within the same dash cam footage. It's not obviously apparent that the vehicle in question is passing or even approaching faster than the other surrounding vehicles. I can even watch the vehicle in question pass by and still be at the same pace as other vehicles in front and behind.

The vehicle was claimed to have been going 70MPH, which is roughly 102FPS, I did a rough count after seeing the vehicle in question round the object in front of the patrol vehicle till the time the vehicle in question approached and left frame; it took roughly ~7 seconds. So theoretically the vehicle should've traveled 718ft in the ~7 seconds. By looking on a Google Maps representation of the exact area of the citation using the video footage, that distance isn't even possibly visible on the video.

Are there any good references for using against such a case such as the apparent objects obstructing the view of the officer and the apparent time it would take to travel that far but would not be possible to do so in the position spotted until the position leaving the camera frame?