[pipodeclown]

'Crew' implies that it is a group of people doing this and therefore they have 35 seconds. You can reconstitute the sentence to check what you should use. In this case you could say in your head:" the crew as a team check the video feed. They have 35 seconds to do this." If this was referring to an individual it would be: "Peter checks the video feed, he has 35 seconds to do this."