It confirmed that she had a brain injury, but was still alive prior to being starved and dehydrated to death. The medical examiner confirmed that a diagnosis of PVS cannot be made from an autopsy, and must be made by a doctor who examined the live patient, like the doctors who examined her and determined she was not PVS. (The only diagnoses of PVS came from doctors who never actually performed the examination.) The autopsy also confirmed that her brain was dehydrated from thirteen days of being forcefully deprived of water. The autopsy confirmed that she died because of the starvation/dehydration imposed on her. Off hand, I can’t think of any other determinations the autopsy revealed related to her brain, but there may be more. Basically, it confirmed what was already known before she was killed.
"Terri Schiavo suffered severe, irreversible brain damage that left that organ discolored and scarred, shriveled to half its normal size, and damaged in nearly all its regions, including the one responsible for vision, according to an autopsy report released yesterday."
That puts a lie to all those 'videos'.