What are "package names" / Why there are different .apk files for each release?

FAQs: https://www.celsoazevedo.com/files/android/google-camera/troubleshooting/#help52

🎥 Slow Motion tip:

If GCam's slow motion doesn't work well on your phone and you're not able to use the stock camera app, try the free and open-source Open Camera (Play Store, F-Droid).

Install it and go to Settings » Camera API » select "Camera2 API". Then go to video mode and from the "drop down" menu click on the left arrow to reduce the "speed". There's "normal", 0.5x, 0.25x, 0.15x:

FAQ's - Slow Motion Issues: https://www.celsoazevedo.com/files/android/google-camera/troubleshooting/#help7