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 assistant as a 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" Like DeviantART and Know Your Meme. 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. It is the name of the group where they to seek the soical aceptance they didn't quite find in the realworld. 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 possibly known as a "pegasister", though it is hard to tell the differnce.
M.L.P. has lots of porn and sex. This caused Mario, Sonic, Ash Ketchum, Quagmire and Justin Bieber to get jealous. People who watch that are called cloppers. Cloppers are "special edition" androids created by 4chan with a purpose of watching pony porn. They come in two forms: Horny Teenagers and 40 year olds. Cloppers are usually male but on rare occasions, they can be female. They are not to be mistaken for perverts. Anyway, Mario and Sonic were frustrated that a candy colored pony ass was considered more sexy than them, so Sonic went Super Saiyan and Mario transformed into King Leonidas. 4chan was crused due to Sonic's spamming abilliy and Mario's Spartan ability. Nowadays, cloppers still exist, but they are very low in number.
Like every other source, a YTP 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 Bronies.