Editors are used to having to make do with what they’re given; it’s part of the gig, but it’s problematic when a piece of footage that’s planned for is nowhere to be found in the edit bay. There’s numerous causes; the media is corrupted in camera, a drive goes bad, not all the footage gets transferred, or the videographer simply didn’t get the shot. There’s no need to point fingers, there’s only a need to solve the problem. That’s where having a general contingency plan ahead of time will save you.