Because HTML 4.0 essentially was a "frozen" version, the specific mechanism for displaying content has been very much format dependent (e.g., Apple QuickTime Movies and Flash video) and usually relies upon tags with varying parameters for passing the relevant information to the server. As a result, video and audio embedding on web pages has become something of a black art .
Its perhaps not surprising then that the <audio> and <video> tags were among the first features to be added to the HTML 5 specification, and these seem to be the first elements of the HTML 5 specification that browser vendors implemented. These particular elements are intended to enable the browser to work with both types of media in an easy-to-use manner. An included support API gives users finer-grained control.
The concept began to come together at Microsoft's Professional Developers Conference. The company is attempting to show that it wants to move beyond the first wave of the cloud trend, which is defined by the availability of raw computing power supplied by Microsoft and competitors such as Amazon and Google. Microsoft's goal is to supply tools, middleware, and services so users can run applications that span corporate and cloud networks, especially those built with Microsoft's Azure cloud operating system.