I sat on a jury for a DWI a few years ago. The police had video of the car showing that the driver was driving erratically. They also had video of the field sobriety test and of the Breathalyzer test being administered at the police station. The defense attorney had all the video evidence thrown out. I'm baffled as to why the jury wasn't allowed to see actual video of the crime.
The Prosceutor probably neglected to obtain permission.
Unfortunately, the County Prosecutor is not always the sharpest knife in the drawer in important cases.