[twelvechairs]

Definitely fake as there is a black square on the right wing in the later (CGI, after the camera has looked up again) images that doesn't exist in the earlier (real) footage. You can clearly see this in the video and your screengrab.

From the video it is also obvious that there is no way someone could have stuck that there in the time it took for the camera to turn away and back again.

[marshray]

Not saying it isn't fake, but the black squares look like silhouettes of some structure underneath. It could easily change as the fabric moves.

[moultano]

Wow, thanks. That clinches it for me.