It sounds brutal and horrible and cruel, but it's actually kind of adorable. In the video, you see a sailfish — perhaps one of the most fascinating creatures of the ocean — chase down fish bait attached to a boat and try to smack the bait silly with its spear-like bill. The sailfish doesn't succeed but he goes a pretty long time trying to stick his nose everywhere.
If you want to know more about the sailfish, here's some highlights: it's one of the fastest swimming fishes known to man (up to 100m in 4.8 seconds), it has a sail, it can make huge jumps and it can instantaneously change colours. You see in the video how the sailfish morphs his white forehead into black.
Oh and it's also really cute looking when it's chasing what it thinks is a school of fish (but is actually a trap attached to a back of a motorboat).