Complex sentence: "Biledriver" is about a fluid-spewing cannon, which can be seen in the "Immortal Corrupter" video and on tour; the cannon itself has now become somewhat of a staple at their live shows.
Split into simpler sentences: Biledriver is about a fluid-spewing cannon, which can be seen in the "Immortal Corrupter" video and on tour. The cannon itself has now become something of a staple at their live shows.