Theoretically you can achieve the same results as in the video with piano wire in place of the sword. A tornado can drive pine straw through a metal pipe. Show me a guy weilding a sword and splitting the bullet (and still not being killed by one of the split fragments), then I am impressed.
This isn't unusual at all. I remember seeing a show years ago about a contest for antique firearms enthusiasts (read: guys who like to dress up like Daniel Boone and run around firing old rifles). The contestants had to run around a timed course and hit targets periodically, the real challenge being that these were old muzzle-loaders so you had to be good at reloading at each station. Anyway, the last station was two plates on either side of an axe blade that faced the shooter. They had to hit the blade dead on so that the bullet would split in half and shatter both plates. At 20 yards or so.
Bullets are predominantly lead which is very soft as far as metals go; designed that way so that when they enter a body them deform or fragment and cause much more damage than going straight through. Would only take a very sharp and sturdy blade to split one if hit dead on.
I actually saw a chinese movie where it was one guy with chopsticks versuses a warehouse filled with badguys armed with whatever the movie's budget was. It was pretty funny watching a guy with chop sticks kick their ass