Both endings are slightly up for interpretation but the reality is this
*Spoilers for those who not played it*
With Ending 1, The Car that lands on the broken down car was chucked by the demon monster thing from the car park. So basically - it got out! Ending 2 is the phones calling the families of the dead. You're the phone near the screen. The big thing that comes out of the base is something that basically creates a massive creator in that part of the world.
Side note the fixed camera for ending 1 has been fixed in already in the update from yesterday. Information on fixes here - https://3dkyle.itch.io/security-booth/devlog/275355/update-to-game