Keep in mind that it takes QUITE a bit longer than it looks in this video. I usually make several pila heads at once, because its an all day job with the heating time alone. For a blacksmithing project however, its one of the most simple things you can do. If you try to make one yourself, just remember that you WILL DESTROY YOUR FIRST 5 TRIES! and try not to get frustrated.
For those of you with not enough time to make your own I sell pilum kits at Soul of the Warrior.