” concluded it’s not real for several reasons.”
One reason. But I was interested in your viewpoint as a left fielder why you thought certain items looked real.
Well, when I played left field, in high school, I caught a few balls in foul ground and that ball, if there really is a ball in that "catch", is only foul by a few feet. But to catch a ball in foul ground it would have to hit pretty high to have time to get there because the left fielder normally positions in fair ground a few yards.
And as you, or someone, pointed out, from looking at batter it looks like the ball was hit on a low trajectory. A golf ball will sometimes start out on a low trajectory and then curve up to be pretty high, but I don't remember seeing a baseball do that.
And the left fielder is the closest defender to where that ball was supposedly hit and, in the video, the left fielder is pretty close when the ball-girl "makes the catch".
If a high fly ball is hit to that location, and if anyone is going to catch it, it's the left fielder.