Where I'm from, a cop leads a funeral procession at about 15 mph, all cars have their lights on (most cars have automatic daytime lamps anyway), and two or three more cops leap frog from the back of the pack to the front and stop side traffic and clear intersections so the pack doesn't have to stop. The motor officer was following standard practice for side traffic control. This was an "accident." The SUV driver pulled up to that stop sign, looked both ways, saw a gap in traffic large enough to cross through and went. It might not have dawned upon the driver that it was a funeral procession if they arrived in the middle of the procession and missed seeing the lead cop. The video taping car might have been the last car in the procession, which would make sense for it to be taping the procession. The cop was probably stopping traffic at the prior intersection when the video car went by. Then, he gassed it to catch up to the front at the same time the other driver gassed it to cut through traffic and--Wham-O!
Of course one motor officer can't clear all intersections, so he picks and chooses. The driver of the SUV can't really be blamed if his view of the officer was obstructed by the video car and there was no other way to tell that it was part of a funeral procession.