You make the call: INT by BR on a potential IFF

[CecilOne]

It took me a while to find time to read and reread this, but now. This applies to the OP, not to any added plays and tangents.

1) There is no interference by the BR in the OP video. She was past the fielder before the fielder began to move to her right.

2) As unlikely as I am to disagree with Big Slick, even with the Dick West ref., I still believe the out occurs at contact with the bat.

A batted ball can become many things, fair, foul, caught, not caught, in play, out of play, etc. All of those are determined by the force, angle and spin given the ball by the bat; including reacting to wind conditions, rocks on the field, slopes on the field and anything else present.

The fair/foul and other analogies above reinforce this view.

3) If there had actually been INT by the retired BR, R1 would be ruled out.