Here's the South Park parody video mocking how much detail is going into Grand Theft Auto VI. The specific game feature they show off is picking up dog poop from a beach level in the game. This is used as a sort of weapon to fight against other people in the game. This is pointing out how realistic Rockstar Games is trying to make their game.
South Park mocks the game's hyper-realistic dog feces weapon mechanics
We see Cartman's reaction to the game's gameplay. "Dude, the game looks straight up *******!" This is a quote from the South Park sketch talking about how awesome the game looks. It's making fun of how much detail is in the game world.
Grand Theft Auto VI will be out in November. It will have lots of detailed things going on in the open world. There are some weird combat things you can do with random objects in the world. It's nice to have a specific date like this for the game.
The South Park parody video helps us understand what's going on with the game development. They're showing some cool things like picking up the dog poop, which you wouldn't normally see in regular trailers. This South Park video is a cultural thing pointing towards the game coming out in November. We know we'll be able to interact with all these cool details in the environment when the game comes out.
Source: IXBT
Rockstar is showing off dog poop mechanics to prove their engine handles physics well. It is a waste of time.