During an event in Tokyo, livetsreamed on Nico Nico, Atlus premiered a brand new video of Persona 5, that will be released on September 15th in Japan and on February 14th 2017 in the west for PS4 and PS3.
The video was definitely juicy, showing the beginning of the game, starting with the prologue and going on for about seventeen minutes. We also get to see name and difficulty selection.
As usual, do keep in mind that the gameplay is recorded from Nico Nico, so the resolution and compression are pretty bad.
Update: The direct feed version of the video has now been posted, and you can see it below (at the bottom of the post you can also see the Nico Nico recording, which includes the opening song).