Top comment on the youtube video actually seems right in this case. Here it is:
"First: It's the Premiere 2011 Trailer. Edited with the XV logo, Wii U logo, and CERO logo.
Second: It's NOT a conference room. It's a classroom, or some other small theatre.
Third: There's an entire five people in the room. Also, you do not cheer in a private conference. It's not for showing off stuff to a crowd, these small events are for press.
Fourth: The Crystal Tools logo. We already know Versus XIII was moved to the Luminous Engine months ago.
Thank you and good night."
After reading that comment and rewatching the video i think the comment is right.
Also changing the name to XV would lower sales, not raise them. FF fans are generally people in the know of game releases etc. so this would just piss them off.
Also the Wii U won't be using bluray. Wasn't part of the reason the Versus was being made because FF13 had to cut a lot to be on the xbox360 since it didn't have blu ray?