It's hard to tell without seeing the actual video footage, but you have a point. The shots of the ocean could be at any number of locations, though. What also throws me off is the costume, which doesn't look very high quality material. The stills of the footage seem to be too amateur to be real and I'm surprised they would show the ocean so clearly. Then again, if it's test footage, then I guess those issues don't matter. Also, I don't think removal of the video and YouTube account is any indication of the footage being real since Disney/Fox does take down YouTube videos on a daily basis, especially high quality videos.