There are numerous breaks in continuity, specific to locomotive and other equipment. One segment follows a train with locomotive number #4320 but often they show locomotive #4009 as the lead engine on the same train.
Many of the "calamities" appeared staged. They couldn't just have enough cameras at the exact points when half the failures happen. It does seem like many of the issues are made to look more urgent or are actually emergency drills rather than real issues.