2005 Mercury Mariner grinding noise, wont start

I have a 2005 mercury mariner that had a hole blown in the engine. We replaced the motor and the starter (the starter kinda broke in half when the hole happened). The vehicle ran for a year and a half but started grinding occassionally when we were starting it. Finally one day it just grinded and wouldn’t start. I went and got a new starter, thinking that was it, but it is still not starting and still grinding. I have a video of what it sounds like when trying to start. Please help!