A couple on their honeymoon in Transylvania crash their car into a lake-the same lake where a witch was drowned many years before. The witch takes over the wife's body and it's up to her husband and a descendent of Van Helsing to save her. Find out more about this movie on it's IMDB page .
You can stream The She Beast (1966) free and legally on OldReel, via the Internet Archive.
Yes — it is in the public domain and can be watched and shared freely.