Complex sentence: After the main unit has finished on a set or location, there may be shots that require some or all of this setting as background, but doesn't require the principal actors-such as close-ups, inserts, cutaways and establishing shots.
Split into simpler sentences: After the main unit has finished on a set or location, there may be shots that require some or all of this setting as background, but doesn't require the principal actors. These shots might include things such as close-ups, inserts, cutaways, and establishing shots.