Some of you might remember when a 3mb flash animation could pack in some 5 minutes of animation, with the more advanced ones even having chapter/scene selectors, which could also include clickable easter eggs and other kinds of interactions during the scenes.
You can find Adobe Flash Player still (just maybe not directly from Adobe) and just run the .FLA through it. No conversion needed unless you wanted to put it back on a website.
Ultra bad advice, flash player was installed at system level and it opens a huge security gap on the system (although I think it would not install at all in modern systems)
Plus when it calls the adobe servers, it downloads the “final” update which automatically disables/uninstalls it
Alternative interpreter: https://ruffle.rs/downloads