There are a heck of a lot more than just internet doctors that dispute the diagnosis of PVS. Furthermore there are credible reports from multiple witnesses of altered medical charts and discarded notes; the unanswered questions about denial of therapy; unanswered questions about the cause of her condition; discrepancies in the husband's testimony in the malpractice suit vs. his later statements; substantial errors in law by Judge Greer; conflicts of interest in the appointment of guardians; the inappropriateness of a blind judge to consider a case with substantial visual evidence; and many other items that together cause very considerable doubt that this case has been properly adjudicated.
There are 22 appeals courts and judges who disagree with all that.
Judge Greer's ability or inability to see a video may be impaired. I don't know. I do know that you can google PVS and see patients who act just like Terri. They move their eyes and make noises. But they have no brain activity. None. Those are involuntary actions.