A video can tell you more than a book sometimes, in today’s world people spend much time watching online video than ever, and study has shown that video do help to explain something, when you read a book, you may get the information abstractly, a related video can make the content vivid and easy-to-understand. - See more at: http://www.flippagemaker.com/faq/how-to-add-youtube-video-to-flipbook-on-mobile-version.html