How do you mean? can't you just go on camera hold up the book and say what you did and didn't like about it? maybe delve a little into the plot and characters as well.
Tell people certain parts of the book and how it made you feel as the reader. Try to connect to the audience emotionally and maybe give some powerful quotes. Overall you need to try to convince the audience that what your saying is right, so back up what you say with evidence and don't forget to keep their attention so try to keep the video under 10 minuets!