Thanks, I think, and I totally don't mean to come across as antagonistic towards the author - I loved his film, he faced huge challenges, and understood how to break the formatting norms slightly while staying within them to get a very exceptional project made. My concern was more that on a place like HN we'd have a dozen smart folks start googling screenwriting software, discover a few open source projects, and become convinced their path to success as app developers was to ship the first screenwriting software with image embedding support included. That seems like a great idea on the surface and it's only when you go deeper into the surrounding infrastructure that you discover why it might actually not be such a great idea as one edge case customer report might suggest.

The bit about the footnote styles was more to help HN readers who are not screenplay experts validate an example from their world where formatting styles communicate in-group vs out-group status, because as you point out "everyone" knows footnote counters start at 0 on HN.