The fact that you call someone a retard while being ignorant of the truth, without even having tried to uncover the truth, is really sad.
"Francis" is just a character done by a comedian who goes by the name of Boogie on youtube. He's been doing it for years (Is getting close to a million subs, I think?) and Francis is supposed to be the stereotypical fat videogame nerd who never lived without being supported by someone. He has anger issues. Basically an over-the-top, stereotypical video game nerd.
So, in short, the guy in that video is just a "fake" personality made to make people laugh. When he's not playing the part of one of his "characters" he does a lot of motivational stuff such as this video.