I have to admit that was the most creative opening of a box I have viewed on You Tube! The gas mask an interesting touch to say the least. It also has piqued my interest in the Monster Box - that's quite a haul to say the very least.
You are right that we should record the opening of bullion boxes. But the chances are extremely rare that there is some mismatch in the actual quantity and the promised one. However, unlike Gold, I hardly ever buy Silver in coins (I prefer bars). So I will never get boxes like that ever in my life.