To the OP and everyone else, if you’re looking to align with @pinwizj and @PAPA_Doug on this “Was this a death save?” ruling, see this link to post #17: Gottlieb Trough Post Save
Pertinent quote from Josh after consulting with Doug: “Outlane drains are not allowed to be actively saved from a center post. If it goes down an outlane and the player actively tries to nudge it back into play, then it is a death save.”
I would say the same applies to aprons to get the ball back up between the flippers, whether you raise a flipper or not.
Back to the instance that started this post, if the TD didn’t witness the nudge to get it back in play, and the player says they didn’t actively try to nudge it back into play, then play on. I wouldn’t use video review.