The Twonky is a 1953 science fiction film, just a hour or so long. It's a comedy, written and directed by Arch Oboler and starring Hans Conreid who was in The Phantom Tollbooth (1970), Bus Stop and many others. Jack Meakin did the music, and according to the imdb listing, he also contributed some of the music used in Night of the Living Dead (1968).
HT: SF Signal
TCM has an overview, as does AMC.