The video appears to take place in the 2fort sub-level.
There is no locked door in the 2fort basement; this was likely added for comedic effect.
There are normally two entrances to the 2fort intelligence room; in the video there is only the locked entrance.
The Scout is wielding The Sandman at 0:18, even though Spies cannot disguise using unlocked weapons, although, as in other movies, this could be a hint toward something in the spy update, or a future patch by Valve.
While the Soldier, Scout and Heavy are in the hall about to enter the intel, they are then seen entering from the other hallway.
The 1 on the keypad to the door appears dirtier then the others, suggesting it has been used more often.
While the Heavy crashes into the Intel room he spins his minigun up while running, and also clocks the Soldier in the face with the barrel.
Several items have been added to the Intelligence room, including: a Cigarette Vending machine, a decorative potted plant, files, folders, and cabinets.