basically, the message from the O5 council was to save humanity from “IT”, then we move to 0:16. that was the SCP foundation trying to kill humanity. then 0:26 was the military trying to stop the SCPs that the SCP foundation had released to end humanity. then the SCP-5000 video was about a guy that merged with SCP-5000, and after waking up from a 3 month blackout, was told by a…consciousness? to deliver a briefcase to SCP-579. after he gets to Site-62a (i think thats the number) he finds SCP-579 and gives the briefcase to him. that “restart the world” was a reference of bringing SCP-579 with SCP-055. THAT was the briefcase. and if you cause the two to be very near, it will reverse a civilization ending catastrophe and does not cause the scenario in another universe.