Vehicle inspection sounds simple, but it's actually a very troublesome process.
On one hand, it's difficult to recognize vehicles in surveillance footage; not all cars are perfectly centered in the frame, clearly showing their emblems and grilles. Some vehicles are at the edges of the frame, which makes severe distortion easier to manage, but the biggest fear is missing or misidentifying something.
It's like searching for something at home. Ransacking through drawers and cabinets isn't hard; the real trouble is fearing that you've missed something. If it's just a casual search, that's one thing, but if you're required to find it and are unsure whether the item is in the house, that's the most exasperating task.
Checking vehicles is similar for the Image Reconnaissance Brigade. The difficulty isn't high, but doing it is a hassle. If it's a minor case, a casual check is fine, but facing major cases can be nerve-wracking.
