When someone purposefully annoys and/or messes with someone in a multiplayer video-game it's called "griefing." A person who does similar actions on the internet (i.e. forums, blogs, Facebook, etc.) is referred to as a "troll." And yes, there are ways to do this in real life as well.
Here is an example of successful internet "trolling":
Troll: Justin Bieber is evil!
Girl: No he's not! Shut up! I hate you!
The troll has received the usual, angry response. This is called "feeding the troll," because they expect these types of negative feedback, and thrive on them.
Here is an example on unsuccessful "trolling":
Troll: Bieber is not talented!
Girl: I know what your doing. Stop trolling. Get a life.
Notice that the target has addressed the attempt of the troll, thus negating the effect, and "starving" the troll.
However, this is a simpler form of trolling. It is more common that a troll has more than one target. In fact, it is very frequent that trolls find a large community to irritate. When one recognizes what is happening, they say "Please don't feed the troll." And this seems to solve the problem, though there are some cases where people are so angry, they disregard such sound advice.
The reason I am talking about trolling is because it is, more or less, a metaphorical explanation of what happened in the video above.
Henry and Michael are the trolls. McKann and Ms. Henry are the targets. The rest are spectators. McKann, a very experienced high school student, recognized what was happening, saying, "I'm not falling for you're dumb jokes," the internet equivalent of "don't feed the troll." Ms. Henry, on the other hand, seemed to aim a more harsh and negative reply of "you can leave", which is what Henry and Michael wanted. After their contribution, they left the room, as it were, with their stomach satisfied.