Questions about Film application for Tisch

I’m currently working on my supplemental application for Tisch and I have some questions about the essays. Does Tisch read the essays submitted through the Common Application and the supplement? Or do they only read the supplement? I would really like my essay on the Common App to be read by Tisch, so if they don’t look at my Common App I would like to find a way to reuse it in my supplemental app.
Also, for the essay we are supposed to write about a significant event in our life and how it changed us, does this have to be one event or can it be a series of related events?