Plugins will soon be a thing of the past. The Definitive Guide to HTML5 Video is the first authoritative book on HTML5 video, the new web standard that allows browsers to support audio and video elements natively. This makes it very easy for web developers to publish audio and video, integrating both within the general presentation of web pages. For example, media elements can be styled using CSS (style sheets), integrated into SVG (scalable vector graphics), and manipulated in a Canvas. The book offers techniques for providing accessibility to media elements, enabling consistent handling of alternative representations of media resources. The Definitive Guide to HTML5 Video dives deep into the markup that is introduced for media element support in browsers. You’ll explore the default user interface offered through browsers for media elements, as well as the JavaScript API provided to control their behavior. You’ll also learn how to account for H.264 and Ogg Theora codecs.
The title of this book is completely in place. That is what exactly what you have in this book, coverage of every aspect of the media elements in HTML5.
There are small examples for every part that make it more clear. Also there are pictures that make you understand much easier what the author is talking about. Every aspect of the video, audio and device element is covered. The comparison with the browsers is from 2010 (with the book was written) and it won't be of much help if you read it now.
Even though Html5 video has progressed considerably since this book was written, still contains invaluable info on using the video tag. ESP if interest is the JavaScript API and using SVG and the canvas with video.