Depends on your intention. If you produce the video with the intent to profit off her fame, and that will certainty be assumed if you use her name in the tags o

Depends on your intention. If you produce the video with the intent to profit off her fame, and that will certainty be assumed if you use her name in the tags or keywords, then it's clearly illegal. But if the video says "this is a deepfake" and is not showing up in search results for her name, then it should be fine. Its just that in the latter case, probably nobody is going to watch it, so the discussion is then moot anyway.