As many of you have noticed already, this video is Nitro+'s April Fool's joke.
According to the official website, a new Mahou Shoujo TV anime series produced by Shaft
and directed by Shinbou Akiyuki
has been announced, entitled "Mahou Shoujo Sonico★Magica
." In addition, the opening animation to the new series has been released on their official youtube
channel. More details are expected to be announced.
Sources: official website
Mahou Shoujo Sonico★Magica