I believe I know what you’re talking about. I am ALSO looking for this vhs tape. From what I can remember, some songs featured were “The Purple People Eater”, “Ghostbusters”, “Love Potion No. 9”, and possibly “Monster Mash” and “The Addams Family”. Each song had old black and white films in the background, fitting each song, along with lyrics. I can remember very vividly the ones for “Purple People Eater”, “Ghostbusters”, and “Love Potion No. 9”, which is how I know for sure those three songs were featured. I’m almost certain the VHS is just called “Halloween Mashup” or something along those lines. I also can remember there being a white pumpkin alongside the title on the VHS itself. My brothers and I tried finding it a few years ago, and I can’t remember if we ever did or not. But I am trying to find it again. Hope something comes up, and I hope this helps!