You would be surprised.

Some shots are indeed impossible to one shot, but others can serendipitously turn out better than you wanted.

I'd say it averages 2.5 generations per shot. A lot of single one off one shots, and some (few) shots that just won't work no matter how hard you prompt.

That said, it's likely you'll find usable footage even in the losses. Videos are meant to be cut. A failed generation might still have salvageable contents you can cut to/from.

Editors are the super powered folks in AI video.