From my experience the best content here is blogposts because they let me to discover great blogs. Also some whitepapers from any time work great for me. Probably you need to publish your work in some history community where folks have their favorite historic period and want to learn History from your website as a starting point.
https://historical-moviemap.inneuro.ai/
It's a fascinating idea and the web site looks very nice. BUT it isn't clear how to use it. How do I see what the movies are? The page shows a world map covered with numbered spots. I thought the spots might be links to information about the movie set at that time/place, but clicking the spot just magnifies the map and replaces the numbered spot with more numbered spots. Oh wait, I tried it again and now information about movies pops up. Why didn't it work before?
I think people might have looked at the page, tried to use it, got frustrated, and left.
The page needs some explanation of how to use it. Besides the spots what is the meaning of the slider at the top? It might be some kind of timeline but what does it do?
Also, the HN crowd might not be the best audience for this. Have you tried announcing this project in forums about movies, or history? (I don't know where these might be, but surely they exist).
To appeal to HN readers, you might add more about the technology that runs the site, how you built the site, etc. That could be the text in the Show HN post or could be linked to the page itself.
Congratulations on getting this far, and good luck!
Could it be that either your target audience is small and/or has little overlap with the Hacker News audience?
Try posting it in a more relevant community. You might generate more interest from people who are actually interested in historical movies vs people interested in technology.
I know you're proud and want to showcase all the technological work you put into it but IMHO that's not what is valuable about this project.
Good luck :)
I wouldn't be too disappointed. Most Show HNs never get any attention.