Yes, "A Hard Day's Night" was also the title of The Beatles' 1st feature film, as well as the title used for the first short in their animated series. Coincidence? Yep.
Unable to find a quiet place to rehearse in, of all places, Transylvania, the band decides to visit a certain spooky castle, at the suggestion of Ringo (Lance Percival), who is presented here as being dumber than a bag of hammers.
The only drawback I can see is Paul Frees' characterization of John & George. His voice for John sounds the same as the one he uses for authority figures, such as Inspector Fenwick (Dudley Do-Right) or the Chief (Secret Squirrel, which also debuted that season), and his George is simply another "Generic Frees Voice". Frees also is the caretaker in the graveyard.
The show open has been deleted by Beatles Planet, who probably didn't time it right.
Executive Producer Al Brodax may have exhausted King Features' expense account on licensing fees for the music, such that he couldn't hire enough actors. Bad idea.