Two government officials are not prepared for the task at hand: performing a surgical operation on which they have no previous training. They try to act like they know the procedure, but they don't, and their unpreparedness results in the patient's death.
The minions participate in a contest to see who can cover the most distance away from the main platform. We don't understand what the minions are saying, but we can infer from their actions that they are participating in such a contest.
Sully and Boo sneak around the office in an attempt to find Mike. During their search, Boo uncovers an underground passage, which they follow to find Mike and Randall. Randall is trying to get information from Mike on Boo's whereabouts, so he starts up the Scream Extractor and shows his intentions to use it on Mike. Although it's not clear what the scream extractor does exactly, based on hints from the scene and Mike's reaction, we can determine that it is not used for something positive.
Sully and Mike take Boo to work so they can put her back in her door. When they enter the office, they are surprised to see the Child Detection Agency there. Based on the events that take place in this clip, we can determine the meaning of vocabulary words such as "obscure," and infer the reason that Sully and Mike are hiding Boo.