[IYAS9YAS]

In acute head trauma, or in major intercranial hemorrhage from strokes, often the brain swells on day 2 to 5, shutting off all circulation to the brain, so the brain dies...and yes they are indeed dead: Only the machines are there keeping the body alive. I believe this is what is happening here.

That would make sense. I linked a video in the post just above yours where Anne sat up on the gurney as she was being hauled to the ambulance. She sat up, looked around, leaned forward, and reached for either the sheet she was covered with or those pushing the gurney. That wouldn't be brain death, but swelling a day or two later makes more sense of the video.

[Paul R.]

It wouldn’t have to be brain swelling. Severe inflammation of the lungs leads to critical pneumonia and O2 levels so low organs (and the brain) are badly damaged or die.