This video is about being able to see the outermost pages in a 6-page display. Here are two options:

Slide the binder back and forth using the rings to bring those outermost pages into view. You can do that confidently knowing your material won’t fall off. It's safely contained in the sheet protectors, and the clips on the swing-out arms will hold it up. It’s easy to slide back and forth to bring those pages into better viewing range.
If sliding the binder isn't an option (it’s on a music stand or you have endcaps on your music rack), consider displaying only 4 pages of music. Use the trifold sheet protectors with just the inner and middle pockets filled (outer pockets will be empty) or use bifold sheet protectors. In this case, you’re still saving some page turns and your music is safely contained and held by the swing-out arm clips.