I would suspect a suction side obstruction or leak along with a motor issue. Your set up shouldn't be losing prime when sitting idle during short periods of down time.
Watching your video, it sort of sounds like the capacitor is trying to start the motor constantly or the centrifugal switch is not operating properly to completely disengage the start winding.
You could try things in the following order:
- Use the valve to direct suction from either the skimmer or the main drain. Does the condition change or improve?
- Verify the impeller spins freely. Turn motor off insert fingers or short screw driver to spin. This might require removing the motor from the pump basket assembly if something is really lodged in there. If you do that you will probably want to have ready access to a new gasket for the reinstall.
- Inspect any vent holes on the motor to ensure nothing is clogged preventing air circulation and there isnt a dead rodent in the motor case, these may be at the bottom rear of the motor. Don't stick anything in the vent holes. Just check them using a mirror and flash light if necessary.
- Check that appropriate voltage is coming to the cut off switch, then timer (if present), then going to the motor. If the circuit is wired for 220v, it is possible that one leg has an issue. Don't try this if you haven't got the tools and knowledge, find someone who does.
- Ensure the motor is wired/set for either 110v or 220v, to match whatever supplied voltage is present. Don't try this if you haven't got the tools and knowledge, find someone who does.
- Depending on your knowledge and experience you could test and swap the capacitor and or centrifugal switch.
If you don't have the knowledge and experience, you could call an electrician to test the wiring, versus calling the pool store. Any motor work beyond replacing the capacitor may require removal and transport to a shop as advised by an electrician. I will recommend correcting this quickly as that clicking starting/stopping is likely going to burn up the unit in short order.