I think you have made a mistake, I think its an optical illusion. Here an example of the type of illusion:-
http://mathworld.wolfram.com/YoungGirl-OldWomanIllusion.html
Here is a second:-
http://mathworld.wolfram.com/Rabbit-DuckIllusion.html
I think what we are seeing on the moving video is Loretta Fuddy floating on her back in some kind of trouble, and kicking her legs, the yellow moving object is a training shoe sole.
I can if I focus see something like a diver, but it is the wrong size to be a man in a scuba diving suit.
I think the Media’s resolution change was for once, the local TV people trying not to distress relatives who might recognize people struggling in the water in what was an Air crash with a fatality.
They changed the resolution on the day I freepmailed my ping list asking them to save the file before it got disappeared, when the video had been out for about a month.
When you look at the edits they made when they put their broadcasts together, a picture of their role begins to emerge.