Question regarding video inserts?


I am looking for video inserts, I am not sure if that’s what it’s called. In my videos I will be showing quotations from the books, quotes of the people and other facts like data. What I want is elements of after effects that will let me do this. The video will have a talking person and on it whenever the person mentions facts, numbers, quotations or references this overlay should come on the right/left side or wherever appropriate and have the quotation. I tried looking around videohive but can’t find anything. Any help would be appreciated.