The cassette instead of VHS REALLY isn't a big deal. Please don't feel bad! My little corner of Tumblr (including me) is full of older autistic folk who like gently informing people about inaccuracies. I was hoping by mentioning it in my reblog we could laugh about being old together and not need to bother you about something that doesn't actually matter. It's funny to me because I've never thought of them as the same thing - one is small and for music, the other large and for video, they're played in very different machines - but this fic helped me recognize how similar they are!