Revealing mistake: When Avner finds Carl dead in the hotel bed, you can see a pulse in Carl's neck.
Revealing mistake: During a flashback to the original hostage-taking, we see one hostage get shot and the camera pans to the wall behind him being riddled with bullets. Only problem is that the paper on the wall is bending outwards, caused by the squibs behind it, rather than being pushed inwards by the path of the bullets.
Answer: It's a bit difficult to find out this sort of information as not all films released disclose what they use to edit on. Michael Kahn is perhaps the most famous editor around to edit on flatbed machines and switched to digital editing for time constraints. Many film schools still teach and use flatbed editing so you may still see short films edited on film, just not feature length movies for a variety of reasons.
Lummie ★