Due to the Flash Player reaching end-of-life, it is no longer possible to load this content directly on this page the traditional way in most browsers. However, thanks to a project called Ruffle significant strides are being made to emulate Flash. Currently only ActionScript 2.0 content is supported and functionality isn't perfect yet. But you can toggle between Ruffle and Flash Player modes below (currently works best in Google Chrome):
Load His First Movie in Ruffle | Load His First Movie Using Flash
If you'd like to support the development of Ruffle, check out its Open Collective page.
The first flash movie I have ever made.