Loud chirping noise.

When you shut it off at the end, you can hear some resonance.

I think your flexplate is doing something it shouldn't, causing the starter issue as well. could be rubbing on the starter.

That's where I would look first. Pull the starter and look for signs of rubbing. Also, crank the engine by hand and look at each bolt, down as they pass on the open areas. Give each one a good crank, if the starter looks ok, put it back in and see if it goes away.