She wasn't in a coma for 20 years. She was MCS, Minimally Conscious State. Since when is MCS a coma?
Here is the longer video,
In this title, the woman was asleep for 20 years.
Look at the condition of her body. That is due to not receiving intervention for 20 years. There are things that can be done to prevent that leg from hiking up, or her head being bent to the side which seems to lead the whole body into being lopsided.
When you look into my background, you find out I worked in Early Intervention. I had settled in the "Early" part because I wanted to work with babies, but I had to learn development of the whole lifespan.
There are things that could have been done with this person's body before it had deformed. Proper positioning and simple range of motion could have kept everything symmetrical and moving.