FilmBus is an APK (Android file-only), so you will need an Android environment on your PC. And here’s where an emulator comes in: It’s a program you can run on your PC that can run those apps. Here are some emulators that you can consider, but as a general rule, we recommend BlueStacks, Nox Player, and LDPlayer.
You can do this by downloading both of these for free from their official websites. All you need to do is visit the site and click download. The installer will download to your PC, and then all you need to do is simply install the installer and run the app.