The creator of the video admitted to it being edited but it's still hilarious.
Tri gives us the Qurupeco's ecology. A Qurupeco tries to peacefully munch on some fish in a river, only for a Jaggi to snatch the fish away. The Qurupeco tries again, only to be intercepted by another Jaggi. Upon seeing a third Jaggi, the Qurupeco finally loses its temper and unleashes a roar, scaring the Jaggi away.
The Jaggi fall under the category of being a living CMoF or Too Dumb To Live. Come on, they're dumb enough to piss off a Qurupeco, a Barroth and the Lagiacrus, had you not come along to go after the damn thing.
After a quest is completed, but during the wait time until exiting the map, all participating players are granted damage immunity...but not knockback immunity. Result: Players celebrate by beating the snot out of each other.
Successfully cooking a Well-Done Steak results in a "SO TASTY!" sound clip.
At the end of the Monster Hunter 4 Ultimate trailer a mysterious never before seen monster was glimpsed. When a fan asked one of the people who developed the game what the monster's name is, the response: Steve.
Even better, Steve has become the Fan Nickname for the monster. Ask any fan what they think about "Steve" and they'll know exactly what you're talking about.
Carving more of a drop than the slain monster should logically have. For example, carving two heads from a single-headed monster.
4 Ultimate's North American and PAL release date is February 13, 2015, i.e. the day before Valentine's Day. Cue people agonizing over whether to spend time and money on Monster Hunter or a date, as well as singles relieved that they can spend the day playing Monster Hunter instead.