That video, was the opening to something called Mortal Kombat Rebirth. The video is nearly 8 min long and shows us a very modern take on the Mortal Kombat franchise, everyone is a human (so far), there is no outworld or other dimensions. The characters are all human and have either birth defects, genetic disorders or have mutated their own bodies to become their one other dimensional counterparks.
For instance Baraka was a plastic surgeon that filed down his own teeth and inserted metal spikes into his own body. Reptile is the result of a genetic birth disorder, but Johnny Cage is however a human that was a movie star/kung fu expert.
Now heres the strangest bit... nobody knows if this is a game announcement, a teaser for a movie, or just a VERY expensive fan made movie.