There are a few issues here.
One - some are claiming this is from a video clip. I believe this is false because I ifranview'd the shot really close and it's a photo, not a vid cap (like that isn't obvious without any enhancing).
Two - If there is video, can someone host it so we can see?
Three - I zoomed this up to the pixl level. Whoever did the image seemed to put a lot of effort into blending the head onto the body. They also put Arnold's watch on this guy, but didn't spend nearly as much time blending the pixels around the watch; it's very clearly a paste job there.
Four - I went through about 30 pictures of Arnold recently and cant find any where he doesn't have a ring on his left hand. Maybe he took it off, maybe not.
Five - Look at the forarms in this picture and the forarms in his more recent pictures. They don't look even close.