In previous post, we came to know about html5 and its most powerful features that make html5 unique and future web apps development language. HTML5 video feature somewhere making flash dead (what u say about this..say in comments??). HTML5 is not a markup language, its a mashup language. It brings together the best of markup with the forward-thinking ambition of tomorrow’s semantic and interactive web. HTML5 provides a st of semantic elements – what does it mean semantic ? Semantic means meaningful .