Lets say you're sitting in a fast-food parking lot eating the food you just purchased from the establishment. Your windows are rolled up and the vehicle is turned off. A police officer pulls into the lot and stops behind your car and turns on his spot light to view the license plate and also block your view with the light. He exits the vehicle, walks up to your window and starts demanding ID. You show the ID without rolling down the window. He starts ordering you to exit the vehicle. He gives the reason of "someone called about suspicious vehicle" or says that you are a "suspicious person" but you are not doing anything illegal, you are positive he did not observe you drive the vehicle at any point, and you are eating food with packing, labeling and logo from the location you are parked at.
Are you legally obligated to exit the vehicle upon request? If so, please state the law/statue that gives him standing.
If not, please explain how a U.S. citizen needs to articulate this fact to let the officer know you are not exiting because you are not legally obligated.
Here is a recent video showing a similar situation: https://www.youtube.com/watch?v=JYmpDa1MBdA