You should consider starting the "Lets Make Excuses and Special Plead for NASA" thread.
I was just trying to clarify my post.
But you're still not answering my question.
A forgery can be very difficult to identify. Once a picture or video is published, there's just no way of telling how it was done for sure. That's how UFOlogists, cryptozoologists, and other truth seekers hold on their photographic evidence for so long.
Authors have sometimes admitted to faking their picture or video, but decades after their release. Even a serious study can fail to debunk with absolute certitude a well made fake. That's just a sad reality.
Here, the forgery seems as easy to prove as merely saying it. The strap moves so there's really water around it. A hand moves in the air so it's really grabbing a cable.
Both don't seem to me like the only explanations for a strap or a hand moving. What's the method to identify those suspicious moves with certitude?