The film's fictional Pennsylvania town of 'Shurry bottom' is based off of Hop Bottom, a real town in Susquehanna county.
This movie is a remake of a short film with the same name featured as an episode of Hulu's Bite-Size Halloween.
Wilhelm Scream at around 1:02:15 during the animated scene.
The Mr. Crocket VHS cover is a parody of the Disney Sing Along Songs line of VHS.
Little free libraries (like the ones Mr. Crocket's VHS tape appears in) did not become commonplace until the mid-2000's.