I am starting on a doc about body image and how women feel about themselves. One of the main parts in my film is having women send in video diaries about themselves and how body image affects them. I am wondering, since I will probably never face to face meet them....do i still need "rights"? I know most people have their subjects sign an agreement saying they have the right to use the footage in their film but, i am wondering if i need to do that. if i do, how should i go about that?