HTML5 is a core technology markup language used for structuring and presenting content for the World Wide Web. As of October 2014 this is the final and 5th revision of the already exisitng HTML standard of the World Wide Web Consortium. The previous version, HTML 4, was standardised in 1997. The new version of HTML i.e. the HTML5 has many new syntactic features. These features are designed to make it easy to include and handle multimedia and graphical content on the web without having to resort to proprietary plugins and APIs.
HTML5 provides native support for audio and video elements. With you will no longer need to download a plug-in to watch a YouTube video or listen to a song. HTML5 offers rich media support. Rich content is also accessible on any device, such as smartphones, tablets etc.HTML5 embedded video and audio files are less taxing on mobile devices' batteries, which becomes more important as we see more users embrace and rely on the mobile Web. HTML5 plays a fundamental role in helping you provide a consistent user experience across all media channels.