Yeah, every time I have ever had to hand over footage to the police for thefts at our family store, I clip and organizr that shit. I also include a paper identifying each file, the timestamps and what happened during them, any details I identified that they can corroborate (physical description, identifiable clothing/tattoos, make and model of vehicle, license plate number, etc.). I often end up putting in 1-2 hours of work on it watching, editing and transferring footage.

If you want traction and results from the police, you need to make it as easy as possible for them by doing the heavy lifting yourself. The cynical view is that thats because they just don't care, but also, in fairness, your case is one of dozens of cases on their desk and the cases never stop coming. This is your priority, so put in the effort instead of expecting others do so. That being said, that is much easier when you have direct access to the cctv footage. I'm guessing this student didnt.