I have a play, hope you can do a video on it... R1, no outs, BR hits ball out in front of plate, F2 go to field the ball and BR makes contact with F2. What's the call? Interference or Obstruction?
At 7:19 you call a courtesy runner for the pitcher a “ pinch runner.” This is wrong. Words have meaning and context is everything. A courtesy runner is not a pinch runner. A pinch runner is a substitute for another player in the game. A courtesy runner is not a substitute.