Agree, that shows what appears to be the left hand flap extended. However in the photos I've attached you can see, when the flap is extended it runs along a lot of the wing, out past the replica gun and is mostly painted black and white. In the video (and the photo you have attached) the flap appears to be inside the replica gun and I can't see any black and white paint.) It could be the angle the video is taken from that that makes the right wing intake scoop (see first photo I've attached) make it look like a flap.
My son took these photo as the aircraft taxiing out last week in Brisbane, but no flaps set. The second photo shows the aircraft parked in Brisbane with the flaps extended.