HTML 5 Developer @fu-vision

HTML 5 is the latest version of the hyper-text markup language used to build websites. While it offers many of the same features as previous versions, there are several new features that open up world of opportunities. However, some webmasters are skeptical of making the switch to HTML5, fearing it's not worth their time or effort. If you're still on the fence, check out some of the top benefits of HTML5 listed below.
1) Built-In Video/Audio Playback

In previous HTML versions, webmasters were forced to use third-party programs, such as Adobe Flash Player, Quicktime or Silverlight, in order to play video and video. This was a messy, archaic method for web-based media playback that often resulted in errors. HTML5 has solved this problem with its full support for video and audio.
Here's an example of HTML5 video playback code:
<video poster="movie.jpg" controls>
<source src= movie.ogg" type="video/ogg">
<source src="movie.mp4" type="video/mp4">
Your browser does not support the <code>video</code> element.
</video>
Notice how there are two files in the above code? This allows browsers to choose the one that's compatible. If a visitor's web browser doesn't support .ogg format, it will move on to the next file listed (.mp4).
2) Offline Caching
HTML5 also offers offline caching, meaning visitors can load certain elements on a webpage without an active internet connection assuming they've visited the site in the past. If a visitor's internet connection happens to go down, he or she can still load core elements of the site.
With HTML5, webmasters can define which files visitors' browsers save. Offline caching is something that's entirely new with HTML5.
3) Cleaner Code
Don't you hate looking at a long sheet of messy HTML code? Trying to make even basic changes to a website built with bad code can be a nightmare. HTML5 is designed to offer cleaner code that's not only easier for developers, but also optimized for improved search engine readability. And when search engine are able to 'understand' the content of a website more easily, it usually translates into higher search rankings.
4) Browser Cross-Compatibility
A fourth benefit of HTML5 is the simple fact that its cross-compatible with all of the major web browsers, including Firefox, Internet Explorer, Chrome, Safari and Opera. This doesn't necessarily mean that all of these browsers will support every new element introduced in HTML5, but they will be able to read the doctype at the very least.
5) Mobile Optimization
If you still need another reason to use HTML5, here's one: it's optimized for the creation of mobile websites and applications. Responsive websites are easily built using HTML5, offering full functionality across all types of devices. Without the need for horizontal scrolling, mobile internet users can browse websites more efficiently.
Adobe has since discontinued support for their mobile Flash Player, paving the way for HTML5 to handle interactive tasks on mobile devices.