Writing Feedback / WRITING TASK 1: MOVIES SEEN IN THEATERS [4]

... in a theatre during the 15 years.
a period of 15 years.

... of movies seen watched by the teenagers at individuals between 18 and 24 years of age...... etc.

This looks great! Good luck, let me know if you need more help

Undergraduate / My own chords - Common App Essay [4]

I understood that I will would never ... unless I create created something of my own

I would also recommend perhaps mentioning something along the lines of "At college, I will bring an appreciation for everyone's talents, ideas, etc"
In addition, your last paragraph -- the sentence " Who I am does not always add ..." I would recommend rewording this in a way that doesn't make you look bad in front of some people, other than that, great job! The hook is terrific, and it is clear that you have a lot of potential to bring to the colleges you are attending!