Perhaps someone can clear this up for me, but WHY in the world is seatbelt jamming such a common problem?
I was just asking myself, "How often do seat belt buckles actually jam?" Is there a statistic anywhere out there?
Seat belts are probably cut all the time by first responders, but I suspect that few are actually because the buckle jammed, as Martin also alluded to. I would think that the majority of cases where the belts are cut have nothing to do with the buckle. The structural damage to the vehicle or the final position of the belted occupants probably make it easier to cut the belt than try to reach the buckle.
I didn't watch that video, but was the buckle actually jammed? If a car interior is on fire, the last thing I want to do is stick my head inside a flaming oven to reach over and unbuckle the belt. Is that the reason why they're yelling for something to cut the belt?