My favorite part is probably the meat-filled boot. You know, for when you need to cut someone's foot in half.
Another favorite aspect is of course Mr. Cold Steel himself, the rotund middle-aged guy who keeps changing shirts/ties. Looks straight out of a Tim & Eric bit.
I've now seen a bunch of their other videos - there are a LOT of them - and Mr. Cold Steel appears in all of them. Some are pretty lame, some are decidedly unnerving, such as the promos for their smallest knives, which they say are essential for surviving in the "urban jungle". Ew brother. They even have a sword kane! All the videos feature the same remarkable production values, various cuts of meat, and non-descript instrumental heavy metal.