Downloading and installing "Scene 5" via an APK involves a process known as "sideloading":
This process bypasses the Play Protect security scans performed by Google on store apps, placing the burden of security entirely on the user. Scene 5 Apk Download
Since you aren't using the Play Store, Android will block the installation by default. Downloading and installing "Scene 5" via an APK
An APK (Android Package Kit) is the file format used by the Android operating system for the distribution and installation of mobile apps. An APK contains all the elements that an app needs to install correctly on a device: This process bypasses the Play Protect security scans
When a user downloads an APK outside of the Play Store, they are essentially manually executing a process that the store usually automates, including verification and security scanning.