https://www.indiewire.com/2015/11/indiewires-ultimate-guide-to-documentary-filmmaking-55398/
The Indiewire has a good compiles a list of articles from 2015 that serve as guidleines for documentary filmmaking.
https://thescriptlab.com/screenwriting-101/screenplay/genre/
Understanding film genres (and sub-genres) is important, because let’s be honest: people rarely go to the movies to be surprised. They know the action hero will survive, that the girl will get the guy, and the villains will get their just deserts. Nobody goes to a rom-com to face reality.
The truth is that love is hell and sometimes the bad guys win, but in the movies, love is a holy elixir and the hero always saves the day. Screenwriting is not about reinventing the wheel. The key to writing a sellable script is to understand the genre and meet the expectations of its audience.
https://www.liveabout.com/guide-to-classic-movie-genres-728307
http://www.movieindustrymarketing.com/cgi-bin/gt/tpl.h,content=116
This new look at genre and demographics makes sense from a marketing strategy direction because it gives the storyteller more breadth…they are now telling a story to an audience, rather than cooking a new but different recipe that fits a genre.
https://www.filmsite.org/genres2.html
There are many other (non-genre) film categories that cross-over many traditional genre film types, such as: animated films, UK films, classic films, family-oriented children’s films, cult films, documentary films, serial films, sexual/erotic films, and silent films.