Ok, that is good, because epilepsy is much less likely then. It may be the tv. Children of that age are not able to follow cartoons on tv, because their vision is not clear yet and the action is far too quick. Furthermore the changing lights and colours on the screen are too much for a sensitive nervous system of a baby. Imagine were she was only six month ago! Light and vision there where always the same. Please don't let her watch tv before she is at least two, better three years old. For now: The twitching should stop after a week without tv, except in the moment she falls asleep or wakes up, or gets frightened. If not, she should see a doctor. I wish her and you all the best!
Yes, because this is a frightening moment for little children. Reality is louder and brighter than their dreams.