When Twilight Sparkle is forced out her home to quit writing Hetalia fanfiction and go make some real friends, she goes to Ponyville with her boy toy dragon, Spike. Within five minutes, she makes five new friends who, rather coincidentally bear along with her the six Elements of Harmony with which they go on many adventures so the audience can overcome their zoophilliac shame and learn the social skills they desire.
Bronies are a peculiar sub-human species that serve as the link between humans and pigs. Due to having no social, love, or working life, they find the time to spread memes, horrible fanart, and "OCs". They have ultimately turned a once enjoyable show into the greatest pestilence on the internet since Desu. Despite the show's teachings, bronies are extremely hostile towards humans who speak against them, and often attempt to force others into The Herd.
The Herd is the name of the group where they to seek the soicial aceptance they didn't quite find in the real world. Bronies come in two breeds; one a fat 40 year old living alone as the government provides for him, and the other, a greasy teenager with any form of "high functioning" autism. Do not be confused however, they are not human and should not be treated as such. A female brony is know as a "pegasister", though it is hard to tell the differnce.
Like every other source, a My Little Pony Poop is not worth watching as it's made by the same greasy 14 year olds who watch the show. MLP Poops are usually done in a modern style with more annoying special effects and less funny content. There are, however, Poops for this source that can be passable, but they are all made by non bronies.