Will not start without being primed

The fact that it runs after you help it shows the injectors are working. Most likely the pump is the issue. I attached the process on how to do this. I would start with turning the key on and checking the pressure. Then try to start it and see what it does. I suspect it will be low from the start. If it is, then the pump is most likely going to need to be replaced.

Let me know what you find with the pressure and we can go from there. Thanks

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Checked the fuel pressure turn key on got about 40 psi while at idle about 45.

Interesting. That is at the low end of the spec but I would not expect it to cause a no start.

When this does not start does it just crank and crank until you pour fuel in it?

Can you get a video of this when it is doing it? Also, what happens if you just turn the key to the on position (last one before cranking/start) and then back off and repeat a couple times then try to start the engine?

Basically make the pump come on and off a couple times to try and prime the system. Does the engine start then?