Operationally I highly doubt it was there at the beginning of the attack, but could have gotten overhead near the end. If a Navy ship in the area had a UAS package aboard they could get it overhead faster, but they specified Predator so it would have come from further out. They aren't THAT fast. The Specters and fighters mentioned wouldn't be available either, for the same reason. Bry the time they arrived on station the attack would have been over.
Now, if they something overhead at the beginning, the video would be available to anyone in the area. They would not have been armed or able to use a weapon if it was, due to ROE.