Thanks for this Adrian. These are all great ideas and I'm sure the big streaming platforms are already doing a lot of this. I also realized that IMDb has a lot of free, downloadable data here: https://developer.imdb.com/non-commercial-datasets/

That could be used for creating genre, format, and other taxonomies.

There is also a screenwriters taxonomy that looks pretty cool but it is not freely available as far as I can tell: https://en.wikipedia.org/wiki/Screenwriters_Taxonomy