I watched the video...I think I understand the intent with the whole manage one task at a time but the execution seems to be hard to follow. Perhaps an alternative way to ease players in would be something like: 

You work in an office and you have:
1. A call
2. An urgent email to respond to
3. A chat window from the boss asking for a presentation to be done (so you have to be putting that together too)

Then your job is to switch between all of them, one at a time, to address them each with their own meter to indicate how close your are to failing that task because too much time has passed since your last interaction. With the catch that you don't know that each interaction is acting for until you switch to them and they might even change if you take long enough so it's not like you can think of a solution while you are addressing the other because the person might have ran out of patience and ask for something different.