Yea, you can see the outline better with contrast and brightness adjusted.I think that's the window there. In that photo we're still approaching the AA from the left, so the window isn't centered like it is in the video. I'm guessing it was a translucent material with a bright light behind it. Someone certainly put a lot of thought into this scene. I'm guessing there's a spotlight in the side panel to her right as well since it looks like she's getting hit with a much warmer light from there.