Gremlins Book & Record Set!
This is fantastic. Someone ripped the audio from one of those old Gremlins book-and-record sets, where you were supposed to read along to a record’s narration. (Helpfully, the video includes not just the narration, but scanned pages from the old storybook!)
Forget the “reading” part, because this is such an oddly soothing thing to go to sleep to!